./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-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-array-int-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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:33:17,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:33:17,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:33:17,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:33:17,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:33:17,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:33:17,675 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:33:17,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:33:17,676 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:33:17,676 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:33:17,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:33:17,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:33:17,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:33:17,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:33:17,678 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:33:17,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:33:17,678 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:33:17,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:33:17,679 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:33:17,680 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:33:17,680 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:33:17,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:33:17,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:33:17,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:17,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:33:17,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:33:17,682 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 -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2025-02-08 08:33:17,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:33:17,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:33:17,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:33:17,958 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:33:17,958 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:33:17,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2025-02-08 08:33:19,263 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8f466e14e/79474f88afa44615b87e0820b476f83c/FLAGa31101632 [2025-02-08 08:33:19,553 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:33:19,554 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2025-02-08 08:33:19,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8f466e14e/79474f88afa44615b87e0820b476f83c/FLAGa31101632 [2025-02-08 08:33:19,574 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8f466e14e/79474f88afa44615b87e0820b476f83c [2025-02-08 08:33:19,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:33:19,579 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:33:19,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:19,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:33:19,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:33:19,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706704cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19, skipping insertion in model container [2025-02-08 08:33:19,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,607 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:33:19,803 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 08:33:19,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:19,821 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:33:19,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:33:19,873 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:33:19,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19 WrapperNode [2025-02-08 08:33:19,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:33:19,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:19,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:33:19,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:33:19,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,924 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 258 [2025-02-08 08:33:19,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:33:19,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:33:19,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:33:19,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:33:19,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,943 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,970 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-08 08:33:19,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,983 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,984 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:33:19,992 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:33:19,992 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:33:19,992 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:33:19,993 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (1/1) ... [2025-02-08 08:33:19,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:33:20,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:20,024 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 08:33:20,032 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 08:33:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:33:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:33:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:33:20,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:33:20,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:33:20,054 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 08:33:20,173 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:33:20,175 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:33:20,353 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52: havoc #t~ret5#1; [2025-02-08 08:33:20,356 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-1: havoc #t~mem4#1; [2025-02-08 08:33:20,357 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-2: havoc #t~mem3#1; [2025-02-08 08:33:20,357 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-3: ~res1~0 := #t~ret5#1; [2025-02-08 08:33:20,357 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret5#1 && #t~ret5#1 <= 2147483647; [2025-02-08 08:33:20,357 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:33:20,358 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:33:20,358 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L52-7: #t~ret5#1 := minus_#res#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66: havoc #t~ret11#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-1: havoc #t~mem10#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-2: havoc #t~mem9#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-3: ~res2~0 := #t~ret11#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret11#1 && #t~ret11#1 <= 2147483647; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:33:20,460 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L66-7: #t~ret11#1 := minus_#res#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80: havoc #t~ret17#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-1: havoc #t~mem16#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-2: havoc #t~mem15#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-3: ~res3~0 := #t~ret17#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret17#1 && #t~ret17#1 <= 2147483647; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:33:20,542 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L80-7: #t~ret17#1 := minus_#res#1; [2025-02-08 08:33:20,752 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:33:20,752 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:33:21,085 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:33:21,086 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:33:21,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:21 BoogieIcfgContainer [2025-02-08 08:33:21,086 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:33:21,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:33:21,089 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:33:21,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:33:21,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:33:19" (1/3) ... [2025-02-08 08:33:21,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d2150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:21, skipping insertion in model container [2025-02-08 08:33:21,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:33:19" (2/3) ... [2025-02-08 08:33:21,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d2150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:33:21, skipping insertion in model container [2025-02-08 08:33:21,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:33:21" (3/3) ... [2025-02-08 08:33:21,095 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2025-02-08 08:33:21,108 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:33:21,110 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-subst.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2025-02-08 08:33:21,110 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:33:21,194 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:33:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2025-02-08 08:33:21,278 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2025-02-08 08:33:21,283 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:33:21,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 258 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2025-02-08 08:33:21,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2025-02-08 08:33:21,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2025-02-08 08:33:21,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:33:21,316 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;@5eeb8a80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:33:21,316 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2025-02-08 08:33:21,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:33:21,322 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:33:21,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:33:21,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:21,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:33:21,323 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:21,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash 747000, now seen corresponding path program 1 times [2025-02-08 08:33:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456088677] [2025-02-08 08:33:21,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:21,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:33:21,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:33:21,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:21,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:21,573 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 08:33:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:21,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456088677] [2025-02-08 08:33:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456088677] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:21,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:21,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:33:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903526567] [2025-02-08 08:33:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:21,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:33:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:21,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:33:21,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:33:21,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:21,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 08:33:21,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:21,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:21,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:22,090 INFO L124 PetriNetUnfolderBase]: 794/1819 cut-off events. [2025-02-08 08:33:22,091 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2025-02-08 08:33:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 1819 events. 794/1819 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13064 event pairs, 608 based on Foata normal form. 1/1201 useless extension candidates. Maximal degree in co-relation 2822. Up to 1135 conditions per place. [2025-02-08 08:33:22,108 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 33 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-02-08 08:33:22,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 75 transitions, 238 flow [2025-02-08 08:33:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:33:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:33:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2025-02-08 08:33:22,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-02-08 08:33:22,123 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 171 transitions. [2025-02-08 08:33:22,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 75 transitions, 238 flow [2025-02-08 08:33:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 226 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:22,135 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 160 flow [2025-02-08 08:33:22,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2025-02-08 08:33:22,141 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:33:22,142 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 160 flow [2025-02-08 08:33:22,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 08:33:22,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:22,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:33:22,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:33:22,143 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:22,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 747001, now seen corresponding path program 1 times [2025-02-08 08:33:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633074432] [2025-02-08 08:33:22,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:22,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:33:22,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:33:22,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:22,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:22,448 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 08:33:22,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633074432] [2025-02-08 08:33:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633074432] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:22,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:33:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667330350] [2025-02-08 08:33:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:22,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:22,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:22,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:22,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 08:33:22,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:22,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:22,867 INFO L124 PetriNetUnfolderBase]: 794/1818 cut-off events. [2025-02-08 08:33:22,867 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:33:22,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999 conditions, 1818 events. 794/1818 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13080 event pairs, 608 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 2970. Up to 1143 conditions per place. [2025-02-08 08:33:22,880 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 33 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2025-02-08 08:33:22,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 232 flow [2025-02-08 08:33:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:33:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:33:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2025-02-08 08:33:22,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2025-02-08 08:33:22,883 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 160 flow. Second operand 4 states and 214 transitions. [2025-02-08 08:33:22,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 232 flow [2025-02-08 08:33:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:22,885 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 162 flow [2025-02-08 08:33:22,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2025-02-08 08:33:22,887 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-02-08 08:33:22,887 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 162 flow [2025-02-08 08:33:22,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 08:33:22,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:22,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-08 08:33:22,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:33:22,888 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:22,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash 23159401, now seen corresponding path program 1 times [2025-02-08 08:33:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179993499] [2025-02-08 08:33:22,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:22,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-08 08:33:22,912 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-08 08:33:22,912 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:22,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:23,130 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 08:33:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179993499] [2025-02-08 08:33:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179993499] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:23,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:23,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477699096] [2025-02-08 08:33:23,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:23,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:23,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:23,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:23,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:23,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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 08:33:23,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:23,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:23,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:23,635 INFO L124 PetriNetUnfolderBase]: 796/1824 cut-off events. [2025-02-08 08:33:23,635 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:33:23,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3016 conditions, 1824 events. 796/1824 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13129 event pairs, 608 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 2992. Up to 1146 conditions per place. [2025-02-08 08:33:23,652 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 36 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2025-02-08 08:33:23,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 80 transitions, 266 flow [2025-02-08 08:33:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2025-02-08 08:33:23,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-02-08 08:33:23,655 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 162 flow. Second operand 5 states and 264 transitions. [2025-02-08 08:33:23,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 80 transitions, 266 flow [2025-02-08 08:33:23,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:23,661 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 207 flow [2025-02-08 08:33:23,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2025-02-08 08:33:23,662 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2025-02-08 08:33:23,662 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 207 flow [2025-02-08 08:33:23,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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 08:33:23,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:23,663 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-08 08:33:23,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:33:23,663 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:23,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:23,663 INFO L85 PathProgramCache]: Analyzing trace with hash 717944007, now seen corresponding path program 1 times [2025-02-08 08:33:23,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:23,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119279298] [2025-02-08 08:33:23,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:23,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:23,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:33:23,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:33:23,686 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:23,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:23,905 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 08:33:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119279298] [2025-02-08 08:33:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119279298] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:23,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:23,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265846379] [2025-02-08 08:33:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:23,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:23,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:23,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:24,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:24,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 08:33:24,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:24,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:24,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:24,406 INFO L124 PetriNetUnfolderBase]: 797/1827 cut-off events. [2025-02-08 08:33:24,406 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-08 08:33:24,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3038 conditions, 1827 events. 797/1827 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13119 event pairs, 608 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 2994. Up to 1149 conditions per place. [2025-02-08 08:33:24,422 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 37 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2025-02-08 08:33:24,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 305 flow [2025-02-08 08:33:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2025-02-08 08:33:24,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2025-02-08 08:33:24,427 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 207 flow. Second operand 5 states and 264 transitions. [2025-02-08 08:33:24,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 305 flow [2025-02-08 08:33:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:24,430 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 249 flow [2025-02-08 08:33:24,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2025-02-08 08:33:24,432 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2025-02-08 08:33:24,432 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 249 flow [2025-02-08 08:33:24,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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 08:33:24,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:24,433 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:33:24,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:33:24,433 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:24,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 781371207, now seen corresponding path program 1 times [2025-02-08 08:33:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:24,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753655565] [2025-02-08 08:33:24,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:24,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:33:24,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:33:24,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:24,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:24,677 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 08:33:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753655565] [2025-02-08 08:33:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753655565] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908205186] [2025-02-08 08:33:24,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:24,683 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 08:33:24,685 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 08:33:24,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:33:24,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:33:24,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:24,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:24,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 08:33:24,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:24,820 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 08:33:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:24,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:25,120 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 08:33:25,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908205186] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:25,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:33:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123387115] [2025-02-08 08:33:25,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:25,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:33:25,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:25,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:33:25,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:33:25,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:25,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 249 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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 08:33:25,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:25,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:25,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:26,155 INFO L124 PetriNetUnfolderBase]: 797/1826 cut-off events. [2025-02-08 08:33:26,155 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-02-08 08:33:26,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1826 events. 797/1826 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13152 event pairs, 608 based on Foata normal form. 0/1208 useless extension candidates. Maximal degree in co-relation 3008. Up to 1142 conditions per place. [2025-02-08 08:33:26,167 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 33 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2025-02-08 08:33:26,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 335 flow [2025-02-08 08:33:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2025-02-08 08:33:26,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2025-02-08 08:33:26,169 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 249 flow. Second operand 7 states and 351 transitions. [2025-02-08 08:33:26,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 335 flow [2025-02-08 08:33:26,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 82 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:26,172 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 262 flow [2025-02-08 08:33:26,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2025-02-08 08:33:26,173 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2025-02-08 08:33:26,173 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 262 flow [2025-02-08 08:33:26,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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 08:33:26,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:26,173 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-08 08:33:26,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:33:26,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:26,378 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:26,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:26,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1545519777, now seen corresponding path program 1 times [2025-02-08 08:33:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:26,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117728600] [2025-02-08 08:33:26,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:26,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:33:26,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:33:26,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:26,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:26,692 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 08:33:26,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117728600] [2025-02-08 08:33:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117728600] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717471244] [2025-02-08 08:33:26,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:26,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:26,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:26,695 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 08:33:26,697 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 08:33:26,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 08:33:26,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 08:33:26,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:26,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:26,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:33:26,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:26,805 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 10 treesize of output 9 [2025-02-08 08:33:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:26,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:27,185 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 08:33:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717471244] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:27,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:27,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-08 08:33:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436188206] [2025-02-08 08:33:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:27,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:33:27,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:27,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:33:27,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:33:27,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:27,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 262 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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 08:33:27,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:27,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:27,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:28,410 INFO L124 PetriNetUnfolderBase]: 797/1825 cut-off events. [2025-02-08 08:33:28,411 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-02-08 08:33:28,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3061 conditions, 1825 events. 797/1825 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13149 event pairs, 608 based on Foata normal form. 0/1208 useless extension candidates. Maximal degree in co-relation 3011. Up to 1141 conditions per place. [2025-02-08 08:33:28,423 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 29 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2025-02-08 08:33:28,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 346 flow [2025-02-08 08:33:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 350 transitions. [2025-02-08 08:33:28,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-02-08 08:33:28,425 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 262 flow. Second operand 7 states and 350 transitions. [2025-02-08 08:33:28,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 346 flow [2025-02-08 08:33:28,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 313 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:28,428 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 255 flow [2025-02-08 08:33:28,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2025-02-08 08:33:28,429 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2025-02-08 08:33:28,429 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 255 flow [2025-02-08 08:33:28,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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 08:33:28,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:28,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:28,438 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 08:33:28,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:28,631 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:28,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash -663087535, now seen corresponding path program 1 times [2025-02-08 08:33:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043744444] [2025-02-08 08:33:28,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:28,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:33:28,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:33:28,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:28,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:28,722 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 08:33:28,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:28,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043744444] [2025-02-08 08:33:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043744444] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:28,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:28,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:33:28,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837451298] [2025-02-08 08:33:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:28,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:28,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:28,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:28,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:28,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 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 08:33:28,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:28,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:28,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:29,091 INFO L124 PetriNetUnfolderBase]: 1382/3114 cut-off events. [2025-02-08 08:33:29,091 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-02-08 08:33:29,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5268 conditions, 3114 events. 1382/3114 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24358 event pairs, 871 based on Foata normal form. 0/2071 useless extension candidates. Maximal degree in co-relation 3575. Up to 1359 conditions per place. [2025-02-08 08:33:29,109 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 82 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2025-02-08 08:33:29,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 597 flow [2025-02-08 08:33:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:33:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:33:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 363 transitions. [2025-02-08 08:33:29,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7202380952380952 [2025-02-08 08:33:29,111 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 255 flow. Second operand 6 states and 363 transitions. [2025-02-08 08:33:29,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 597 flow [2025-02-08 08:33:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 540 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:29,114 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 318 flow [2025-02-08 08:33:29,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2025-02-08 08:33:29,115 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 4 predicate places. [2025-02-08 08:33:29,115 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 318 flow [2025-02-08 08:33:29,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 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 08:33:29,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:29,116 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:29,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:33:29,116 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:29,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1635915547, now seen corresponding path program 1 times [2025-02-08 08:33:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066165123] [2025-02-08 08:33:29,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:29,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:33:29,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:33:29,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:29,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:29,195 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 08:33:29,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066165123] [2025-02-08 08:33:29,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066165123] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:29,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:29,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:33:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756832660] [2025-02-08 08:33:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:29,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:29,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:29,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:29,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:29,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:33:29,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:29,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:29,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:29,524 INFO L124 PetriNetUnfolderBase]: 1179/2660 cut-off events. [2025-02-08 08:33:29,524 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2025-02-08 08:33:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4675 conditions, 2660 events. 1179/2660 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19932 event pairs, 782 based on Foata normal form. 0/1783 useless extension candidates. Maximal degree in co-relation 3716. Up to 1370 conditions per place. [2025-02-08 08:33:29,539 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 73 selfloop transitions, 12 changer transitions 2/123 dead transitions. [2025-02-08 08:33:29,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 579 flow [2025-02-08 08:33:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:33:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:33:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2025-02-08 08:33:29,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2025-02-08 08:33:29,542 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 318 flow. Second operand 6 states and 356 transitions. [2025-02-08 08:33:29,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 579 flow [2025-02-08 08:33:29,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 575 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:29,549 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 354 flow [2025-02-08 08:33:29,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2025-02-08 08:33:29,550 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2025-02-08 08:33:29,550 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 354 flow [2025-02-08 08:33:29,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:33:29,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:29,550 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:29,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:33:29,550 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:29,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1315861142, now seen corresponding path program 1 times [2025-02-08 08:33:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569520649] [2025-02-08 08:33:29,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:29,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:33:29,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:33:29,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:29,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569520649] [2025-02-08 08:33:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569520649] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:29,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:29,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:33:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506945398] [2025-02-08 08:33:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:29,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:29,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:29,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:29,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:29,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:33:29,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:29,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:29,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:30,104 INFO L124 PetriNetUnfolderBase]: 1832/4113 cut-off events. [2025-02-08 08:33:30,104 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2025-02-08 08:33:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7753 conditions, 4113 events. 1832/4113 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 33128 event pairs, 1033 based on Foata normal form. 62/2912 useless extension candidates. Maximal degree in co-relation 5561. Up to 1728 conditions per place. [2025-02-08 08:33:30,124 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 94 selfloop transitions, 11 changer transitions 0/141 dead transitions. [2025-02-08 08:33:30,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 743 flow [2025-02-08 08:33:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:33:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:33:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 359 transitions. [2025-02-08 08:33:30,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7123015873015873 [2025-02-08 08:33:30,126 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 354 flow. Second operand 6 states and 359 transitions. [2025-02-08 08:33:30,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 743 flow [2025-02-08 08:33:30,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:33:30,132 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 424 flow [2025-02-08 08:33:30,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2025-02-08 08:33:30,135 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2025-02-08 08:33:30,135 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 424 flow [2025-02-08 08:33:30,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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 08:33:30,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:30,136 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:30,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:33:30,136 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:30,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash -222253557, now seen corresponding path program 1 times [2025-02-08 08:33:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480123687] [2025-02-08 08:33:30,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:30,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:30,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:30,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:30,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:30,208 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 08:33:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480123687] [2025-02-08 08:33:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480123687] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:30,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:30,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:33:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818479528] [2025-02-08 08:33:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:30,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:30,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:30,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:30,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:30,237 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:30,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 08:33:30,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:30,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:30,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:30,619 INFO L124 PetriNetUnfolderBase]: 1572/3474 cut-off events. [2025-02-08 08:33:30,619 INFO L125 PetriNetUnfolderBase]: For 1394/1394 co-relation queries the response was YES. [2025-02-08 08:33:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6859 conditions, 3474 events. 1572/3474 cut-off events. For 1394/1394 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26295 event pairs, 1092 based on Foata normal form. 0/2396 useless extension candidates. Maximal degree in co-relation 4011. Up to 1772 conditions per place. [2025-02-08 08:33:30,638 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 86 selfloop transitions, 10 changer transitions 2/134 dead transitions. [2025-02-08 08:33:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 755 flow [2025-02-08 08:33:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:33:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:33:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 351 transitions. [2025-02-08 08:33:30,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2025-02-08 08:33:30,640 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 424 flow. Second operand 6 states and 351 transitions. [2025-02-08 08:33:30,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 755 flow [2025-02-08 08:33:30,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 751 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:30,647 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 452 flow [2025-02-08 08:33:30,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2025-02-08 08:33:30,647 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 20 predicate places. [2025-02-08 08:33:30,648 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 452 flow [2025-02-08 08:33:30,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 08:33:30,648 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:30,648 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:30,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:33:30,648 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:30,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2086145784, now seen corresponding path program 1 times [2025-02-08 08:33:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591805692] [2025-02-08 08:33:30,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:30,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:30,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:30,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:30,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:30,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:30,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591805692] [2025-02-08 08:33:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591805692] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:30,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:30,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:33:30,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648639042] [2025-02-08 08:33:30,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:30,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:30,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:30,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:30,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-02-08 08:33:30,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 08:33:30,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:30,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-02-08 08:33:30,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:31,242 INFO L124 PetriNetUnfolderBase]: 2213/4643 cut-off events. [2025-02-08 08:33:31,242 INFO L125 PetriNetUnfolderBase]: For 1838/1838 co-relation queries the response was YES. [2025-02-08 08:33:31,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9390 conditions, 4643 events. 2213/4643 cut-off events. For 1838/1838 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 35520 event pairs, 1872 based on Foata normal form. 0/3494 useless extension candidates. Maximal degree in co-relation 5843. Up to 3282 conditions per place. [2025-02-08 08:33:31,264 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 57 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2025-02-08 08:33:31,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 574 flow [2025-02-08 08:33:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2025-02-08 08:33:31,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2025-02-08 08:33:31,265 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 452 flow. Second operand 5 states and 223 transitions. [2025-02-08 08:33:31,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 574 flow [2025-02-08 08:33:31,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 94 transitions, 560 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:31,272 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 446 flow [2025-02-08 08:33:31,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2025-02-08 08:33:31,273 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2025-02-08 08:33:31,273 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 446 flow [2025-02-08 08:33:31,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 08:33:31,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:31,274 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:31,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:33:31,274 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:31,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:31,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2086145783, now seen corresponding path program 1 times [2025-02-08 08:33:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508080240] [2025-02-08 08:33:31,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:31,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:31,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:31,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:31,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:31,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:31,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508080240] [2025-02-08 08:33:31,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508080240] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:31,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848360385] [2025-02-08 08:33:31,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:31,525 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 08:33:31,528 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 08:33:31,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:31,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:31,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:31,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:31,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:33:31,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:31,618 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 08:33:31,688 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:33:31,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:33:31,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:31,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:31,746 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:31,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:33:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:31,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:32,011 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 100 treesize of output 96 [2025-02-08 08:33:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:32,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848360385] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:32,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:32,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-02-08 08:33:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703198711] [2025-02-08 08:33:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:32,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:33:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:32,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:33:32,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:33:34,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-02-08 08:33:34,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 446 flow. Second operand has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 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 08:33:34,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:34,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-02-08 08:33:34,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:35,362 INFO L124 PetriNetUnfolderBase]: 3723/7161 cut-off events. [2025-02-08 08:33:35,363 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2025-02-08 08:33:35,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14450 conditions, 7161 events. 3723/7161 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 54877 event pairs, 1075 based on Foata normal form. 0/5443 useless extension candidates. Maximal degree in co-relation 10974. Up to 2284 conditions per place. [2025-02-08 08:33:35,396 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 110 selfloop transitions, 22 changer transitions 1/160 dead transitions. [2025-02-08 08:33:35,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 888 flow [2025-02-08 08:33:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 433 transitions. [2025-02-08 08:33:35,398 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5727513227513228 [2025-02-08 08:33:35,398 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 446 flow. Second operand 9 states and 433 transitions. [2025-02-08 08:33:35,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 888 flow [2025-02-08 08:33:35,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 160 transitions, 876 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:35,409 INFO L231 Difference]: Finished difference. Result has 107 places, 96 transitions, 500 flow [2025-02-08 08:33:35,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=500, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2025-02-08 08:33:35,410 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 23 predicate places. [2025-02-08 08:33:35,410 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 500 flow [2025-02-08 08:33:35,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 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 08:33:35,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:35,410 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:35,420 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 08:33:35,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:35,611 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:35,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1886126657, now seen corresponding path program 1 times [2025-02-08 08:33:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261723077] [2025-02-08 08:33:35,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:35,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:33:35,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:33:35,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:35,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261723077] [2025-02-08 08:33:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261723077] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:35,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:35,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:33:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704996471] [2025-02-08 08:33:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:35,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:35,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:35,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:35,730 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:35,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 08:33:35,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:35,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:36,325 INFO L124 PetriNetUnfolderBase]: 3591/8028 cut-off events. [2025-02-08 08:33:36,325 INFO L125 PetriNetUnfolderBase]: For 5474/5536 co-relation queries the response was YES. [2025-02-08 08:33:36,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16844 conditions, 8028 events. 3591/8028 cut-off events. For 5474/5536 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 70998 event pairs, 2237 based on Foata normal form. 145/6091 useless extension candidates. Maximal degree in co-relation 10906. Up to 3531 conditions per place. [2025-02-08 08:33:36,364 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 98 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2025-02-08 08:33:36,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 920 flow [2025-02-08 08:33:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 306 transitions. [2025-02-08 08:33:36,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7285714285714285 [2025-02-08 08:33:36,366 INFO L175 Difference]: Start difference. First operand has 107 places, 96 transitions, 500 flow. Second operand 5 states and 306 transitions. [2025-02-08 08:33:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 920 flow [2025-02-08 08:33:36,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 143 transitions, 894 flow, removed 11 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:36,376 INFO L231 Difference]: Finished difference. Result has 112 places, 98 transitions, 532 flow [2025-02-08 08:33:36,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=112, PETRI_TRANSITIONS=98} [2025-02-08 08:33:36,377 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2025-02-08 08:33:36,377 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 98 transitions, 532 flow [2025-02-08 08:33:36,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 08:33:36,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:36,378 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:36,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:33:36,378 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:36,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -246009145, now seen corresponding path program 1 times [2025-02-08 08:33:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:36,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714303487] [2025-02-08 08:33:36,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:36,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:36,386 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:36,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:36,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:36,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:36,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714303487] [2025-02-08 08:33:36,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714303487] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:36,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412299345] [2025-02-08 08:33:36,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:36,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:36,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:36,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:36,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-02-08 08:33:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 98 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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 08:33:36,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:36,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-02-08 08:33:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:37,273 INFO L124 PetriNetUnfolderBase]: 4770/9642 cut-off events. [2025-02-08 08:33:37,273 INFO L125 PetriNetUnfolderBase]: For 7312/7312 co-relation queries the response was YES. [2025-02-08 08:33:37,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21609 conditions, 9642 events. 4770/9642 cut-off events. For 7312/7312 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 79588 event pairs, 4174 based on Foata normal form. 0/8252 useless extension candidates. Maximal degree in co-relation 17063. Up to 7153 conditions per place. [2025-02-08 08:33:37,316 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 58 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2025-02-08 08:33:37,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 94 transitions, 660 flow [2025-02-08 08:33:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2025-02-08 08:33:37,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2025-02-08 08:33:37,318 INFO L175 Difference]: Start difference. First operand has 112 places, 98 transitions, 532 flow. Second operand 5 states and 227 transitions. [2025-02-08 08:33:37,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 94 transitions, 660 flow [2025-02-08 08:33:37,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 94 transitions, 653 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:33:37,330 INFO L231 Difference]: Finished difference. Result has 111 places, 94 transitions, 537 flow [2025-02-08 08:33:37,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=111, PETRI_TRANSITIONS=94} [2025-02-08 08:33:37,330 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-02-08 08:33:37,330 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 94 transitions, 537 flow [2025-02-08 08:33:37,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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 08:33:37,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:37,331 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:37,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:33:37,331 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:37,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -246009144, now seen corresponding path program 1 times [2025-02-08 08:33:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:37,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923716558] [2025-02-08 08:33:37,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:37,339 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:37,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:37,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:37,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923716558] [2025-02-08 08:33:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923716558] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64227134] [2025-02-08 08:33:37,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:37,547 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 08:33:37,549 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 08:33:37,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:33:37,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:33:37,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:37,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:37,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:33:37,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:37,640 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 08:33:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:37,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:37,691 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:37,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:33:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:37,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:37,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-08 08:33:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64227134] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:37,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:33:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452172153] [2025-02-08 08:33:37,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:37,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:33:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:37,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:33:37,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:33:38,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2025-02-08 08:33:38,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 94 transitions, 537 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 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 08:33:38,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:38,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2025-02-08 08:33:38,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:39,324 INFO L124 PetriNetUnfolderBase]: 3934/7444 cut-off events. [2025-02-08 08:33:39,324 INFO L125 PetriNetUnfolderBase]: For 6028/6028 co-relation queries the response was YES. [2025-02-08 08:33:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17338 conditions, 7444 events. 3934/7444 cut-off events. For 6028/6028 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 55826 event pairs, 1593 based on Foata normal form. 0/6167 useless extension candidates. Maximal degree in co-relation 13638. Up to 2323 conditions per place. [2025-02-08 08:33:39,346 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 111 selfloop transitions, 24 changer transitions 1/162 dead transitions. [2025-02-08 08:33:39,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1058 flow [2025-02-08 08:33:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 482 transitions. [2025-02-08 08:33:39,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2025-02-08 08:33:39,348 INFO L175 Difference]: Start difference. First operand has 111 places, 94 transitions, 537 flow. Second operand 9 states and 482 transitions. [2025-02-08 08:33:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1058 flow [2025-02-08 08:33:39,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1042 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:39,361 INFO L231 Difference]: Finished difference. Result has 117 places, 96 transitions, 601 flow [2025-02-08 08:33:39,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=601, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2025-02-08 08:33:39,362 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2025-02-08 08:33:39,362 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 601 flow [2025-02-08 08:33:39,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 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 08:33:39,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:39,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:39,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:33:39,567 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,SelfDestructingSolverStorable14 [2025-02-08 08:33:39,567 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:39,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1381608214, now seen corresponding path program 1 times [2025-02-08 08:33:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452529326] [2025-02-08 08:33:39,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:39,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:39,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:39,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:39,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:39,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452529326] [2025-02-08 08:33:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452529326] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:39,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:33:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363261491] [2025-02-08 08:33:39,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:39,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:33:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:39,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:33:39,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:33:39,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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 08:33:39,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:39,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:39,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:40,094 INFO L124 PetriNetUnfolderBase]: 3128/6464 cut-off events. [2025-02-08 08:33:40,094 INFO L125 PetriNetUnfolderBase]: For 8343/8443 co-relation queries the response was YES. [2025-02-08 08:33:40,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15429 conditions, 6464 events. 3128/6464 cut-off events. For 8343/8443 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 50623 event pairs, 2254 based on Foata normal form. 84/5167 useless extension candidates. Maximal degree in co-relation 11764. Up to 3467 conditions per place. [2025-02-08 08:33:40,114 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 89 selfloop transitions, 13 changer transitions 4/134 dead transitions. [2025-02-08 08:33:40,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 1017 flow [2025-02-08 08:33:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:33:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:33:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2025-02-08 08:33:40,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7119047619047619 [2025-02-08 08:33:40,115 INFO L175 Difference]: Start difference. First operand has 117 places, 96 transitions, 601 flow. Second operand 5 states and 299 transitions. [2025-02-08 08:33:40,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 1017 flow [2025-02-08 08:33:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 134 transitions, 953 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:40,125 INFO L231 Difference]: Finished difference. Result has 117 places, 98 transitions, 601 flow [2025-02-08 08:33:40,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=117, PETRI_TRANSITIONS=98} [2025-02-08 08:33:40,126 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2025-02-08 08:33:40,127 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 601 flow [2025-02-08 08:33:40,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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 08:33:40,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:40,128 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:40,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:33:40,128 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:40,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1197048295, now seen corresponding path program 1 times [2025-02-08 08:33:40,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:40,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882619071] [2025-02-08 08:33:40,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:40,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:40,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:40,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:40,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:40,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:33:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882619071] [2025-02-08 08:33:40,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882619071] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630215817] [2025-02-08 08:33:40,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:40,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:40,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:40,377 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 08:33:40,380 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 08:33:40,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:33:40,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:33:40,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:40,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:40,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:33:40,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:40,472 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 08:33:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:40,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:40,537 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-08 08:33:40,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-08 08:33:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:40,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:40,573 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:40,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:33:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:40,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:40,805 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 100 treesize of output 96 [2025-02-08 08:33:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:40,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630215817] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:40,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:40,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-02-08 08:33:40,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529425943] [2025-02-08 08:33:40,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:40,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:33:40,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:40,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:33:40,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:33:44,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-02-08 08:33:44,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 98 transitions, 601 flow. Second operand has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 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 08:33:44,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:44,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-02-08 08:33:44,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:46,189 INFO L124 PetriNetUnfolderBase]: 7627/14367 cut-off events. [2025-02-08 08:33:46,189 INFO L125 PetriNetUnfolderBase]: For 14336/14518 co-relation queries the response was YES. [2025-02-08 08:33:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32966 conditions, 14367 events. 7627/14367 cut-off events. For 14336/14518 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 117058 event pairs, 2375 based on Foata normal form. 0/11617 useless extension candidates. Maximal degree in co-relation 29392. Up to 4712 conditions per place. [2025-02-08 08:33:46,243 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 124 selfloop transitions, 24 changer transitions 1/171 dead transitions. [2025-02-08 08:33:46,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 171 transitions, 1190 flow [2025-02-08 08:33:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:33:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:33:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 430 transitions. [2025-02-08 08:33:46,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2025-02-08 08:33:46,246 INFO L175 Difference]: Start difference. First operand has 117 places, 98 transitions, 601 flow. Second operand 9 states and 430 transitions. [2025-02-08 08:33:46,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 171 transitions, 1190 flow [2025-02-08 08:33:46,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1170 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:46,263 INFO L231 Difference]: Finished difference. Result has 124 places, 99 transitions, 649 flow [2025-02-08 08:33:46,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=649, PETRI_PLACES=124, PETRI_TRANSITIONS=99} [2025-02-08 08:33:46,264 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 40 predicate places. [2025-02-08 08:33:46,264 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 99 transitions, 649 flow [2025-02-08 08:33:46,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 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 08:33:46,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:46,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:46,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:46,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 08:33:46,469 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:46,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1546207814, now seen corresponding path program 1 times [2025-02-08 08:33:46,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:46,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856281226] [2025-02-08 08:33:46,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:46,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:46,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:46,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:46,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:46,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:46,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:46,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856281226] [2025-02-08 08:33:46,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856281226] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:33:46,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:33:46,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:33:46,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623733465] [2025-02-08 08:33:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:46,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:33:46,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:46,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:33:46,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:33:46,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2025-02-08 08:33:46,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 99 transitions, 649 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 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 08:33:46,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:46,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2025-02-08 08:33:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:47,371 INFO L124 PetriNetUnfolderBase]: 5410/10570 cut-off events. [2025-02-08 08:33:47,372 INFO L125 PetriNetUnfolderBase]: For 15130/15398 co-relation queries the response was YES. [2025-02-08 08:33:47,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26212 conditions, 10570 events. 5410/10570 cut-off events. For 15130/15398 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 86053 event pairs, 4810 based on Foata normal form. 0/9683 useless extension candidates. Maximal degree in co-relation 22525. Up to 8080 conditions per place. [2025-02-08 08:33:47,415 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 63 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2025-02-08 08:33:47,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 785 flow [2025-02-08 08:33:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:33:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:33:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2025-02-08 08:33:47,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2025-02-08 08:33:47,417 INFO L175 Difference]: Start difference. First operand has 124 places, 99 transitions, 649 flow. Second operand 4 states and 193 transitions. [2025-02-08 08:33:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 785 flow [2025-02-08 08:33:47,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 95 transitions, 735 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-02-08 08:33:47,432 INFO L231 Difference]: Finished difference. Result has 117 places, 95 transitions, 609 flow [2025-02-08 08:33:47,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=609, PETRI_PLACES=117, PETRI_TRANSITIONS=95} [2025-02-08 08:33:47,433 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2025-02-08 08:33:47,433 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 95 transitions, 609 flow [2025-02-08 08:33:47,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 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 08:33:47,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:47,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:47,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-08 08:33:47,434 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:47,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1546207813, now seen corresponding path program 1 times [2025-02-08 08:33:47,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021885551] [2025-02-08 08:33:47,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:47,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:47,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:47,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:47,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021885551] [2025-02-08 08:33:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021885551] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194646389] [2025-02-08 08:33:47,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:47,577 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 08:33:47,579 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 08:33:47,640 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:33:47,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:33:47,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:47,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:47,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:33:47,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:47,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:47,769 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 08:33:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:47,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194646389] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:47,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:47,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-08 08:33:47,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762749070] [2025-02-08 08:33:47,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:47,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:33:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:47,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:33:47,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:33:48,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:48,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 95 transitions, 609 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 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 08:33:48,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:48,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:48,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:48,870 INFO L124 PetriNetUnfolderBase]: 5157/9116 cut-off events. [2025-02-08 08:33:48,870 INFO L125 PetriNetUnfolderBase]: For 13200/13452 co-relation queries the response was YES. [2025-02-08 08:33:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23651 conditions, 9116 events. 5157/9116 cut-off events. For 13200/13452 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 66130 event pairs, 1923 based on Foata normal form. 0/8260 useless extension candidates. Maximal degree in co-relation 20394. Up to 2822 conditions per place. [2025-02-08 08:33:48,904 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 110 selfloop transitions, 24 changer transitions 2/158 dead transitions. [2025-02-08 08:33:48,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 158 transitions, 1153 flow [2025-02-08 08:33:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 412 transitions. [2025-02-08 08:33:48,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2025-02-08 08:33:48,906 INFO L175 Difference]: Start difference. First operand has 117 places, 95 transitions, 609 flow. Second operand 7 states and 412 transitions. [2025-02-08 08:33:48,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 158 transitions, 1153 flow [2025-02-08 08:33:48,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 158 transitions, 1143 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:33:48,921 INFO L231 Difference]: Finished difference. Result has 122 places, 95 transitions, 663 flow [2025-02-08 08:33:48,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=122, PETRI_TRANSITIONS=95} [2025-02-08 08:33:48,922 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2025-02-08 08:33:48,922 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 95 transitions, 663 flow [2025-02-08 08:33:48,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 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 08:33:48,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:48,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:48,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:33:49,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:49,123 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:49,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -816614958, now seen corresponding path program 1 times [2025-02-08 08:33:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:49,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195428353] [2025-02-08 08:33:49,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:49,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:49,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:33:49,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:33:49,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:49,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195428353] [2025-02-08 08:33:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195428353] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251875284] [2025-02-08 08:33:49,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:49,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:49,283 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 08:33:49,285 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 08:33:49,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:33:49,365 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:33:49,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:49,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:49,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 08:33:49,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:49,376 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 08:33:49,380 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 08:33:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:33:49,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:33:49,429 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:33:49,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:33:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:49,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251875284] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:49,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:33:49,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2025-02-08 08:33:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89623302] [2025-02-08 08:33:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:33:49,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:33:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:49,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:33:49,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:33:50,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 84 [2025-02-08 08:33:50,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 95 transitions, 663 flow. Second operand has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 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 08:33:50,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:50,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 84 [2025-02-08 08:33:50,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:50,924 INFO L124 PetriNetUnfolderBase]: 6590/11717 cut-off events. [2025-02-08 08:33:50,924 INFO L125 PetriNetUnfolderBase]: For 22775/23399 co-relation queries the response was YES. [2025-02-08 08:33:50,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31547 conditions, 11717 events. 6590/11717 cut-off events. For 22775/23399 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 90268 event pairs, 2906 based on Foata normal form. 0/10746 useless extension candidates. Maximal degree in co-relation 27143. Up to 4866 conditions per place. [2025-02-08 08:33:50,971 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 97 selfloop transitions, 23 changer transitions 2/143 dead transitions. [2025-02-08 08:33:50,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 143 transitions, 1161 flow [2025-02-08 08:33:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:33:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:33:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 435 transitions. [2025-02-08 08:33:50,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6473214285714286 [2025-02-08 08:33:50,973 INFO L175 Difference]: Start difference. First operand has 122 places, 95 transitions, 663 flow. Second operand 8 states and 435 transitions. [2025-02-08 08:33:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 143 transitions, 1161 flow [2025-02-08 08:33:50,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 1101 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-08 08:33:50,993 INFO L231 Difference]: Finished difference. Result has 125 places, 95 transitions, 679 flow [2025-02-08 08:33:50,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=679, PETRI_PLACES=125, PETRI_TRANSITIONS=95} [2025-02-08 08:33:50,993 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 41 predicate places. [2025-02-08 08:33:50,993 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 95 transitions, 679 flow [2025-02-08 08:33:50,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 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 08:33:50,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:50,994 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:51,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:33:51,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:51,194 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:51,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1643514065, now seen corresponding path program 1 times [2025-02-08 08:33:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963930253] [2025-02-08 08:33:51,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:51,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:51,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:33:51,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:33:51,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:51,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:51,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963930253] [2025-02-08 08:33:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963930253] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127514337] [2025-02-08 08:33:51,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:51,280 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 08:33:51,282 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 08:33:51,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-08 08:33:51,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-08 08:33:51,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:51,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:51,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:33:51,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:51,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127514337] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:51,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:51,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-02-08 08:33:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853939198] [2025-02-08 08:33:51,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:51,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:33:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:51,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:33:51,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:33:51,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:51,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 95 transitions, 679 flow. Second operand has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 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 08:33:51,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:51,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:51,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:54,282 INFO L124 PetriNetUnfolderBase]: 16682/29743 cut-off events. [2025-02-08 08:33:54,283 INFO L125 PetriNetUnfolderBase]: For 63542/65599 co-relation queries the response was YES. [2025-02-08 08:33:54,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84166 conditions, 29743 events. 16682/29743 cut-off events. For 63542/65599 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 268260 event pairs, 5741 based on Foata normal form. 516/29057 useless extension candidates. Maximal degree in co-relation 44493. Up to 6568 conditions per place. [2025-02-08 08:33:54,394 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 285 selfloop transitions, 67 changer transitions 0/376 dead transitions. [2025-02-08 08:33:54,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 376 transitions, 3045 flow [2025-02-08 08:33:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-08 08:33:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-02-08 08:33:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1603 transitions. [2025-02-08 08:33:54,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6580459770114943 [2025-02-08 08:33:54,396 INFO L175 Difference]: Start difference. First operand has 125 places, 95 transitions, 679 flow. Second operand 29 states and 1603 transitions. [2025-02-08 08:33:54,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 376 transitions, 3045 flow [2025-02-08 08:33:54,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 376 transitions, 2886 flow, removed 20 selfloop flow, removed 7 redundant places. [2025-02-08 08:33:54,460 INFO L231 Difference]: Finished difference. Result has 156 places, 150 transitions, 1359 flow [2025-02-08 08:33:54,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1359, PETRI_PLACES=156, PETRI_TRANSITIONS=150} [2025-02-08 08:33:54,461 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 72 predicate places. [2025-02-08 08:33:54,461 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 150 transitions, 1359 flow [2025-02-08 08:33:54,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 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 08:33:54,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:54,461 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:54,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:33:54,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:54,662 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:54,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 454740801, now seen corresponding path program 1 times [2025-02-08 08:33:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303913439] [2025-02-08 08:33:54,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:54,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:33:54,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:33:54,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:54,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303913439] [2025-02-08 08:33:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303913439] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878885973] [2025-02-08 08:33:54,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:54,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:54,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:54,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:33:54,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-08 08:33:54,883 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:33:54,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:54,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:54,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:33:54,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:54,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:55,012 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 08:33:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878885973] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:55,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:55,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-02-08 08:33:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423480901] [2025-02-08 08:33:55,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:55,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:33:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:55,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:33:55,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:33:55,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-02-08 08:33:55,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 150 transitions, 1359 flow. Second operand has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 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 08:33:55,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:55,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-02-08 08:33:55,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:33:58,891 INFO L124 PetriNetUnfolderBase]: 22580/39287 cut-off events. [2025-02-08 08:33:58,891 INFO L125 PetriNetUnfolderBase]: For 102867/107046 co-relation queries the response was YES. [2025-02-08 08:33:59,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110531 conditions, 39287 events. 22580/39287 cut-off events. For 102867/107046 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 358299 event pairs, 8518 based on Foata normal form. 0/37727 useless extension candidates. Maximal degree in co-relation 107228. Up to 12006 conditions per place. [2025-02-08 08:33:59,077 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 171 selfloop transitions, 41 changer transitions 2/236 dead transitions. [2025-02-08 08:33:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 236 transitions, 2417 flow [2025-02-08 08:33:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:33:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:33:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 409 transitions. [2025-02-08 08:33:59,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6955782312925171 [2025-02-08 08:33:59,078 INFO L175 Difference]: Start difference. First operand has 156 places, 150 transitions, 1359 flow. Second operand 7 states and 409 transitions. [2025-02-08 08:33:59,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 236 transitions, 2417 flow [2025-02-08 08:33:59,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 2380 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-02-08 08:33:59,146 INFO L231 Difference]: Finished difference. Result has 160 places, 151 transitions, 1428 flow [2025-02-08 08:33:59,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1428, PETRI_PLACES=160, PETRI_TRANSITIONS=151} [2025-02-08 08:33:59,147 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 76 predicate places. [2025-02-08 08:33:59,147 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 151 transitions, 1428 flow [2025-02-08 08:33:59,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 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 08:33:59,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:33:59,147 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:33:59,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 08:33:59,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:59,348 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:33:59,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:33:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 447997261, now seen corresponding path program 1 times [2025-02-08 08:33:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:33:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552473245] [2025-02-08 08:33:59,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:33:59,355 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:33:59,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:33:59,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:59,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:33:59,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:33:59,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552473245] [2025-02-08 08:33:59,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552473245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:33:59,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005900062] [2025-02-08 08:33:59,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:33:59,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:33:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:33:59,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:33:59,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:33:59,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-08 08:33:59,512 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-08 08:33:59,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:33:59,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:33:59,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:33:59,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:33:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:59,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:33:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:33:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005900062] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:33:59,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:33:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-02-08 08:33:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890561527] [2025-02-08 08:33:59,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:33:59,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:33:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:33:59,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:33:59,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:33:59,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:33:59,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 151 transitions, 1428 flow. Second operand has 16 states, 16 states have (on average 48.375) internal successors, (774), 16 states have internal predecessors, (774), 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 08:33:59,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:33:59,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:33:59,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:05,363 INFO L124 PetriNetUnfolderBase]: 32212/57270 cut-off events. [2025-02-08 08:34:05,363 INFO L125 PetriNetUnfolderBase]: For 170621/177055 co-relation queries the response was YES. [2025-02-08 08:34:05,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170682 conditions, 57270 events. 32212/57270 cut-off events. For 170621/177055 co-relation queries the response was YES. Maximal size of possible extension queue 2565. Compared 561331 event pairs, 11680 based on Foata normal form. 1069/56362 useless extension candidates. Maximal degree in co-relation 161721. Up to 14218 conditions per place. [2025-02-08 08:34:05,740 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 267 selfloop transitions, 101 changer transitions 12/404 dead transitions. [2025-02-08 08:34:05,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 404 transitions, 3865 flow [2025-02-08 08:34:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-08 08:34:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-08 08:34:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1391 transitions. [2025-02-08 08:34:05,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6623809523809524 [2025-02-08 08:34:05,742 INFO L175 Difference]: Start difference. First operand has 160 places, 151 transitions, 1428 flow. Second operand 25 states and 1391 transitions. [2025-02-08 08:34:05,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 404 transitions, 3865 flow [2025-02-08 08:34:05,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 404 transitions, 3734 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:05,917 INFO L231 Difference]: Finished difference. Result has 185 places, 178 transitions, 1947 flow [2025-02-08 08:34:05,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1947, PETRI_PLACES=185, PETRI_TRANSITIONS=178} [2025-02-08 08:34:05,917 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 101 predicate places. [2025-02-08 08:34:05,917 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 178 transitions, 1947 flow [2025-02-08 08:34:05,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.375) internal successors, (774), 16 states have internal predecessors, (774), 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 08:34:05,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:05,918 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:05,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:06,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-08 08:34:06,119 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:34:06,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash 857072632, now seen corresponding path program 1 times [2025-02-08 08:34:06,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:06,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037449456] [2025-02-08 08:34:06,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:06,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:06,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:34:06,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:34:06,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:06,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:34:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037449456] [2025-02-08 08:34:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037449456] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087909678] [2025-02-08 08:34:06,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:06,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:06,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:34:06,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 08:34:06,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:34:06,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:06,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:06,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:34:06,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:34:06,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:34:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087909678] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:06,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-02-08 08:34:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999555790] [2025-02-08 08:34:06,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:06,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:34:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:06,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:34:06,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:34:06,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-02-08 08:34:06,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 178 transitions, 1947 flow. Second operand has 16 states, 16 states have (on average 48.5625) internal successors, (777), 16 states have internal predecessors, (777), 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 08:34:06,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:06,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-02-08 08:34:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:11,656 INFO L124 PetriNetUnfolderBase]: 26899/48163 cut-off events. [2025-02-08 08:34:11,656 INFO L125 PetriNetUnfolderBase]: For 186154/193570 co-relation queries the response was YES. [2025-02-08 08:34:11,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148140 conditions, 48163 events. 26899/48163 cut-off events. For 186154/193570 co-relation queries the response was YES. Maximal size of possible extension queue 2195. Compared 461426 event pairs, 11378 based on Foata normal form. 822/47711 useless extension candidates. Maximal degree in co-relation 140088. Up to 12508 conditions per place. [2025-02-08 08:34:11,966 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 283 selfloop transitions, 89 changer transitions 26/422 dead transitions. [2025-02-08 08:34:11,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 422 transitions, 4500 flow [2025-02-08 08:34:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-08 08:34:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-08 08:34:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1193 transitions. [2025-02-08 08:34:11,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6763038548752834 [2025-02-08 08:34:11,968 INFO L175 Difference]: Start difference. First operand has 185 places, 178 transitions, 1947 flow. Second operand 21 states and 1193 transitions. [2025-02-08 08:34:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 422 transitions, 4500 flow [2025-02-08 08:34:12,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 422 transitions, 4438 flow, removed 16 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:12,327 INFO L231 Difference]: Finished difference. Result has 206 places, 192 transitions, 2292 flow [2025-02-08 08:34:12,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2292, PETRI_PLACES=206, PETRI_TRANSITIONS=192} [2025-02-08 08:34:12,328 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 122 predicate places. [2025-02-08 08:34:12,328 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 192 transitions, 2292 flow [2025-02-08 08:34:12,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.5625) internal successors, (777), 16 states have internal predecessors, (777), 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 08:34:12,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:12,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:12,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:12,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-08 08:34:12,531 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:34:12,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 946264102, now seen corresponding path program 2 times [2025-02-08 08:34:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:12,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743341053] [2025-02-08 08:34:12,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:12,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:12,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-08 08:34:12,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:34:12,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:12,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:34:12,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:12,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743341053] [2025-02-08 08:34:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743341053] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:12,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985155031] [2025-02-08 08:34:12,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:12,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:12,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:12,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:34:12,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-02-08 08:34:12,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 08:34:12,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:12,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:12,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 08:34:12,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:12,990 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:34:12,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-02-08 08:34:13,007 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-02-08 08:34:13,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-02-08 08:34:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:34:13,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:34:13,084 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-02-08 08:34:13,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-02-08 08:34:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:13,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:13,415 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 100 treesize of output 96 [2025-02-08 08:34:13,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:34:13,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 164 [2025-02-08 08:34:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:34:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985155031] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:13,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-02-08 08:34:13,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377374343] [2025-02-08 08:34:13,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:13,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:34:13,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:13,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:34:13,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:34:16,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2025-02-08 08:34:16,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 192 transitions, 2292 flow. Second operand has 23 states, 23 states have (on average 35.17391304347826) internal successors, (809), 23 states have internal predecessors, (809), 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 08:34:16,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:16,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2025-02-08 08:34:16,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:25,436 INFO L124 PetriNetUnfolderBase]: 51098/81291 cut-off events. [2025-02-08 08:34:25,437 INFO L125 PetriNetUnfolderBase]: For 316868/327906 co-relation queries the response was YES. [2025-02-08 08:34:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257299 conditions, 81291 events. 51098/81291 cut-off events. For 316868/327906 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 705547 event pairs, 9286 based on Foata normal form. 868/81179 useless extension candidates. Maximal degree in co-relation 247274. Up to 21292 conditions per place. [2025-02-08 08:34:25,949 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 363 selfloop transitions, 76 changer transitions 8/464 dead transitions. [2025-02-08 08:34:25,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 464 transitions, 4981 flow [2025-02-08 08:34:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 08:34:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-08 08:34:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 914 transitions. [2025-02-08 08:34:25,950 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.544047619047619 [2025-02-08 08:34:25,950 INFO L175 Difference]: Start difference. First operand has 206 places, 192 transitions, 2292 flow. Second operand 20 states and 914 transitions. [2025-02-08 08:34:25,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 464 transitions, 4981 flow [2025-02-08 08:34:26,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 464 transitions, 4906 flow, removed 12 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:26,140 INFO L231 Difference]: Finished difference. Result has 220 places, 194 transitions, 2410 flow [2025-02-08 08:34:26,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2410, PETRI_PLACES=220, PETRI_TRANSITIONS=194} [2025-02-08 08:34:26,141 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 136 predicate places. [2025-02-08 08:34:26,141 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 194 transitions, 2410 flow [2025-02-08 08:34:26,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 35.17391304347826) internal successors, (809), 23 states have internal predecessors, (809), 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 08:34:26,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:26,141 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:26,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 08:34:26,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:26,342 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2025-02-08 08:34:26,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:26,342 INFO L85 PathProgramCache]: Analyzing trace with hash -730583221, now seen corresponding path program 1 times [2025-02-08 08:34:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:26,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795695611] [2025-02-08 08:34:26,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:26,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:26,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:34:26,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:34:26,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:26,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:34:26,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:26,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795695611] [2025-02-08 08:34:26,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795695611] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:26,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456735274] [2025-02-08 08:34:26,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:26,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:26,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:34:26,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:34:26,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:34:26,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:26,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:26,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-08 08:34:26,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:26,623 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 08:34:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:34:26,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:34:26,691 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:34:26,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:34:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:34:26,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:26,860 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 52 treesize of output 48 [2025-02-08 08:34:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:34:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456735274] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:26,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-02-08 08:34:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734665228] [2025-02-08 08:34:26,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:26,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:34:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:26,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:34:26,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:34:28,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2025-02-08 08:34:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 194 transitions, 2410 flow. Second operand has 20 states, 20 states have (on average 42.95) internal successors, (859), 20 states have internal predecessors, (859), 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 08:34:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2025-02-08 08:34:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand