./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.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/parallel-parallel-sum-equiv.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 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:37:56,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:37:56,992 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:37:56,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:37:56,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:37:57,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:37:57,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:37:57,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:37:57,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:37:57,020 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:37:57,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:37:57,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:37:57,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:37:57,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:37:57,021 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:37:57,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:37:57,022 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:37:57,023 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:37:57,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:37:57,024 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:37:57,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:37:57,024 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 -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2025-02-08 08:37:57,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:37:57,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:37:57,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:37:57,254 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:37:57,254 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:37:57,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2025-02-08 08:37:58,403 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3e8266efc/28c2c0f510d840899b1456d86bbd854e/FLAG6d00b6d95 [2025-02-08 08:37:58,680 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:37:58,680 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2025-02-08 08:37:58,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3e8266efc/28c2c0f510d840899b1456d86bbd854e/FLAG6d00b6d95 [2025-02-08 08:37:58,972 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3e8266efc/28c2c0f510d840899b1456d86bbd854e [2025-02-08 08:37:58,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:37:58,975 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:37:58,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:37:58,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:37:58,979 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:37:58,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:37:58" (1/1) ... [2025-02-08 08:37:58,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac233f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:58, skipping insertion in model container [2025-02-08 08:37:58,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:37:58" (1/1) ... [2025-02-08 08:37:58,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:37:59,108 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 08:37:59,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:37:59,120 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:37:59,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:37:59,160 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:37:59,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59 WrapperNode [2025-02-08 08:37:59,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:37:59,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:37:59,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:37:59,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:37:59,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,191 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 247 [2025-02-08 08:37:59,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:37:59,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:37:59,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:37:59,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:37:59,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,202 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,221 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:37:59,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,230 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:37:59,238 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:37:59,238 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:37:59,238 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:37:59,239 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (1/1) ... [2025-02-08 08:37:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:37:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:37:59,274 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 08:37:59,281 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 08:37:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:37:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:37:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:37:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:37:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:37:59,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:37:59,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:37:59,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 08:37:59,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:37:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:37:59,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:37:59,309 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 08:37:59,390 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:37:59,392 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L56: [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55: havoc #t~ret4#1; [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55-1: ~s_2~0 := #t~ret4#1; [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55-2: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret4#1 && #t~ret4#1 <= 2147483647; [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55-3: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55-4: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:37:59,517 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55-5: #t~ret4#1 := plus_#res#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73: havoc #t~ret8#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73-1: ~s_2~0 := #t~ret8#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73-2: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret8#1 && #t~ret8#1 <= 2147483647; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73-3: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73-4: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L73-5: #t~ret8#1 := plus_#res#1; [2025-02-08 08:37:59,587 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L74: [2025-02-08 08:37:59,650 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112: havoc #t~ret16#1; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112-1: ~s_6~0 := #t~ret16#1; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112-2: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret16#1 && #t~ret16#1 <= 2147483647; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112-3: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112-4: havoc plus_~a#1, plus_~b#1; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L112-5: #t~ret16#1 := plus_#res#1; [2025-02-08 08:37:59,652 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113: [2025-02-08 08:37:59,748 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:37:59,749 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:37:59,950 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L163 is not an error location. [2025-02-08 08:37:59,951 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L163 is not an error location. [2025-02-08 08:37:59,951 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L163 is not an error location. [2025-02-08 08:37:59,951 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:37:59,952 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:37:59,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:37:59 BoogieIcfgContainer [2025-02-08 08:37:59,952 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:37:59,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:37:59,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:37:59,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:37:59,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:37:58" (1/3) ... [2025-02-08 08:37:59,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3877a07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:37:59, skipping insertion in model container [2025-02-08 08:37:59,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:37:59" (2/3) ... [2025-02-08 08:37:59,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3877a07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:37:59, skipping insertion in model container [2025-02-08 08:37:59,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:37:59" (3/3) ... [2025-02-08 08:37:59,958 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2025-02-08 08:37:59,969 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:37:59,971 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-parallel-sum-equiv.wvr.c that has 5 procedures, 62 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-02-08 08:37:59,971 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:38:00,050 INFO L143 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2025-02-08 08:38:00,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 70 transitions, 180 flow [2025-02-08 08:38:00,110 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2025-02-08 08:38:00,111 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 08:38:00,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 63 events. 6/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 142 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2025-02-08 08:38:00,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 70 transitions, 180 flow [2025-02-08 08:38:00,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 62 transitions, 154 flow [2025-02-08 08:38:00,127 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:38:00,134 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;@381ea8a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:38:00,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2025-02-08 08:38:00,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:38:00,137 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:38:00,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:38:00,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:00,138 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:38:00,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:00,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash 708044, now seen corresponding path program 1 times [2025-02-08 08:38:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116436914] [2025-02-08 08:38:00,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:00,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:00,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:38:00,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:38:00,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:00,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:00,322 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 08:38:00,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:00,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116436914] [2025-02-08 08:38:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116436914] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:00,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:38:00,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489734399] [2025-02-08 08:38:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:00,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:38:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:00,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:38:00,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:38:00,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-08 08:38:00,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 08:38:00,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:00,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-08 08:38:00,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:01,736 INFO L124 PetriNetUnfolderBase]: 14952/20659 cut-off events. [2025-02-08 08:38:01,737 INFO L125 PetriNetUnfolderBase]: For 1142/1142 co-relation queries the response was YES. [2025-02-08 08:38:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42839 conditions, 20659 events. 14952/20659 cut-off events. For 1142/1142 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 113728 event pairs, 14687 based on Foata normal form. 1/15836 useless extension candidates. Maximal degree in co-relation 42761. Up to 20630 conditions per place. [2025-02-08 08:38:01,830 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2025-02-08 08:38:01,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 56 transitions, 244 flow [2025-02-08 08:38:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:38:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:38:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-02-08 08:38:01,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2025-02-08 08:38:01,838 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 154 flow. Second operand 3 states and 86 transitions. [2025-02-08 08:38:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 56 transitions, 244 flow [2025-02-08 08:38:01,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:38:01,856 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 126 flow [2025-02-08 08:38:01,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2025-02-08 08:38:01,859 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2025-02-08 08:38:01,859 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 126 flow [2025-02-08 08:38:01,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 08:38:01,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:01,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:38:01,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:38:01,860 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:01,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash 708045, now seen corresponding path program 1 times [2025-02-08 08:38:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:01,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615227770] [2025-02-08 08:38:01,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:01,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:38:01,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:38:01,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:01,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:02,123 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 08:38:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:02,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615227770] [2025-02-08 08:38:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615227770] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:02,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:02,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:38:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662160256] [2025-02-08 08:38:02,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:02,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:02,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:02,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:02,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-08 08:38:02,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 08:38:02,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:02,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-08 08:38:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:03,215 INFO L124 PetriNetUnfolderBase]: 14953/20662 cut-off events. [2025-02-08 08:38:03,216 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2025-02-08 08:38:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41805 conditions, 20662 events. 14953/20662 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 113753 event pairs, 14687 based on Foata normal form. 0/15838 useless extension candidates. Maximal degree in co-relation 41783. Up to 20635 conditions per place. [2025-02-08 08:38:03,293 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 51 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-02-08 08:38:03,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 244 flow [2025-02-08 08:38:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2025-02-08 08:38:03,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-02-08 08:38:03,297 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 126 flow. Second operand 4 states and 96 transitions. [2025-02-08 08:38:03,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 244 flow [2025-02-08 08:38:03,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:03,299 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 149 flow [2025-02-08 08:38:03,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2025-02-08 08:38:03,301 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2025-02-08 08:38:03,302 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 149 flow [2025-02-08 08:38:03,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 08:38:03,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:03,302 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:38:03,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:38:03,302 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:03,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 680453136, now seen corresponding path program 1 times [2025-02-08 08:38:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:03,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555355935] [2025-02-08 08:38:03,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:03,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:03,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:38:03,318 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:38:03,318 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:03,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:03,507 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 08:38:03,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555355935] [2025-02-08 08:38:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555355935] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392030903] [2025-02-08 08:38:03,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:03,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:03,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:03,513 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 08:38:03,515 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 08:38:03,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:38:03,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:38:03,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:03,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:03,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:38:03,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:03,623 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 8 treesize of output 1 [2025-02-08 08:38:03,737 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 08:38:03,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:03,813 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 08:38:03,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392030903] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:03,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:03,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:38:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019821588] [2025-02-08 08:38:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:03,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:38:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:03,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:38:03,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:38:03,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-08 08:38:03,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 08:38:03,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:03,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-08 08:38:03,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:04,958 INFO L124 PetriNetUnfolderBase]: 14954/20664 cut-off events. [2025-02-08 08:38:04,958 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2025-02-08 08:38:04,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41821 conditions, 20664 events. 14954/20664 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 113778 event pairs, 14687 based on Foata normal form. 0/15839 useless extension candidates. Maximal degree in co-relation 41790. Up to 20632 conditions per place. [2025-02-08 08:38:05,031 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 47 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2025-02-08 08:38:05,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 271 flow [2025-02-08 08:38:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:38:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:38:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2025-02-08 08:38:05,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.24131944444444445 [2025-02-08 08:38:05,033 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 149 flow. Second operand 8 states and 139 transitions. [2025-02-08 08:38:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 271 flow [2025-02-08 08:38:05,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:38:05,034 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 174 flow [2025-02-08 08:38:05,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2025-02-08 08:38:05,035 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2025-02-08 08:38:05,035 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 174 flow [2025-02-08 08:38:05,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 08:38:05,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:05,035 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:05,052 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 08:38:05,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:05,236 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:05,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:05,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1865223292, now seen corresponding path program 1 times [2025-02-08 08:38:05,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:05,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429669543] [2025-02-08 08:38:05,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:05,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:05,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:05,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:05,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:05,319 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 08:38:05,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429669543] [2025-02-08 08:38:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429669543] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:05,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:38:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966322957] [2025-02-08 08:38:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:05,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:05,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:05,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:05,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2025-02-08 08:38:05,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 08:38:05,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:05,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2025-02-08 08:38:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:06,098 INFO L124 PetriNetUnfolderBase]: 11165/15500 cut-off events. [2025-02-08 08:38:06,098 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2025-02-08 08:38:06,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31416 conditions, 15500 events. 11165/15500 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 82228 event pairs, 10942 based on Foata normal form. 0/12736 useless extension candidates. Maximal degree in co-relation 31378. Up to 15467 conditions per place. [2025-02-08 08:38:06,159 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 50 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-02-08 08:38:06,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 276 flow [2025-02-08 08:38:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-02-08 08:38:06,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2025-02-08 08:38:06,161 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 174 flow. Second operand 4 states and 91 transitions. [2025-02-08 08:38:06,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 276 flow [2025-02-08 08:38:06,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 234 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-08 08:38:06,162 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 134 flow [2025-02-08 08:38:06,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2025-02-08 08:38:06,163 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2025-02-08 08:38:06,163 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 134 flow [2025-02-08 08:38:06,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 08:38:06,163 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:06,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:06,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:38:06,164 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:06,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1865223291, now seen corresponding path program 1 times [2025-02-08 08:38:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:06,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889917815] [2025-02-08 08:38:06,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:06,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:38:06,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:38:06,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:06,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:06,230 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 08:38:06,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:06,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889917815] [2025-02-08 08:38:06,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889917815] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:06,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:06,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:06,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498155179] [2025-02-08 08:38:06,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:06,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:06,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:06,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:06,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:06,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 08:38:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:06,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:07,170 INFO L124 PetriNetUnfolderBase]: 19122/26611 cut-off events. [2025-02-08 08:38:07,170 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2025-02-08 08:38:07,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53951 conditions, 26611 events. 19122/26611 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 155260 event pairs, 12452 based on Foata normal form. 391/22465 useless extension candidates. Maximal degree in co-relation 31378. Up to 15472 conditions per place. [2025-02-08 08:38:07,289 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 121 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2025-02-08 08:38:07,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 129 transitions, 543 flow [2025-02-08 08:38:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2025-02-08 08:38:07,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2025-02-08 08:38:07,292 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 134 flow. Second operand 5 states and 179 transitions. [2025-02-08 08:38:07,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 129 transitions, 543 flow [2025-02-08 08:38:07,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:07,295 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 148 flow [2025-02-08 08:38:07,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2025-02-08 08:38:07,296 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2025-02-08 08:38:07,297 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 148 flow [2025-02-08 08:38:07,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 08:38:07,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:07,298 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:07,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:38:07,298 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:07,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:07,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1578007322, now seen corresponding path program 1 times [2025-02-08 08:38:07,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:07,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378821028] [2025-02-08 08:38:07,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:07,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:07,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:38:07,310 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:38:07,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:07,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:07,388 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 08:38:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378821028] [2025-02-08 08:38:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378821028] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:07,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:07,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571741632] [2025-02-08 08:38:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:07,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:07,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:07,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:07,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:07,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 08:38:07,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:07,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:07,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:08,154 INFO L124 PetriNetUnfolderBase]: 14883/20823 cut-off events. [2025-02-08 08:38:08,154 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2025-02-08 08:38:08,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43756 conditions, 20823 events. 14883/20823 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 115820 event pairs, 12569 based on Foata normal form. 432/17732 useless extension candidates. Maximal degree in co-relation 32565. Up to 15472 conditions per place. [2025-02-08 08:38:08,231 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 90 selfloop transitions, 4 changer transitions 4/102 dead transitions. [2025-02-08 08:38:08,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 445 flow [2025-02-08 08:38:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2025-02-08 08:38:08,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-02-08 08:38:08,233 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 148 flow. Second operand 5 states and 154 transitions. [2025-02-08 08:38:08,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 445 flow [2025-02-08 08:38:08,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:08,236 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 166 flow [2025-02-08 08:38:08,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2025-02-08 08:38:08,236 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2025-02-08 08:38:08,236 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 166 flow [2025-02-08 08:38:08,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 08:38:08,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:08,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:08,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:38:08,237 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:08,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 362339298, now seen corresponding path program 1 times [2025-02-08 08:38:08,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:08,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115140029] [2025-02-08 08:38:08,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:08,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:08,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:38:08,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:38:08,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:08,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115140029] [2025-02-08 08:38:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115140029] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648134359] [2025-02-08 08:38:08,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:08,305 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 08:38:08,306 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 08:38:08,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:38:08,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:38:08,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:08,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:08,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:38:08,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:08,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:08,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648134359] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:08,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:08,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 08:38:08,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930399518] [2025-02-08 08:38:08,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:08,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:38:08,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:08,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:38:08,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:38:08,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:08,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 166 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 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 08:38:08,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:08,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:08,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:09,865 INFO L124 PetriNetUnfolderBase]: 22840/31890 cut-off events. [2025-02-08 08:38:09,865 INFO L125 PetriNetUnfolderBase]: For 3173/3173 co-relation queries the response was YES. [2025-02-08 08:38:09,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69694 conditions, 31890 events. 22840/31890 cut-off events. For 3173/3173 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 193017 event pairs, 11041 based on Foata normal form. 391/26987 useless extension candidates. Maximal degree in co-relation 58503. Up to 12922 conditions per place. [2025-02-08 08:38:09,993 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 148 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2025-02-08 08:38:09,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 162 transitions, 746 flow [2025-02-08 08:38:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:38:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:38:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2025-02-08 08:38:09,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2025-02-08 08:38:09,996 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 166 flow. Second operand 8 states and 245 transitions. [2025-02-08 08:38:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 162 transitions, 746 flow [2025-02-08 08:38:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 162 transitions, 741 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:38:10,011 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 206 flow [2025-02-08 08:38:10,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2025-02-08 08:38:10,013 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2025-02-08 08:38:10,013 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 206 flow [2025-02-08 08:38:10,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 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 08:38:10,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:10,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:10,020 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 08:38:10,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:10,214 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:10,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1243043799, now seen corresponding path program 1 times [2025-02-08 08:38:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956553000] [2025-02-08 08:38:10,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:10,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:38:10,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:38:10,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:10,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:10,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956553000] [2025-02-08 08:38:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956553000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865329177] [2025-02-08 08:38:10,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:10,378 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 08:38:10,380 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 08:38:10,421 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-08 08:38:10,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:38:10,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:10,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:10,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-08 08:38:10,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:10,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:38:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865329177] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:10,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-08 08:38:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656980956] [2025-02-08 08:38:10,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:10,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 08:38:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:10,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 08:38:10,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-02-08 08:38:10,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:10,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 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 08:38:10,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:10,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:10,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:12,190 INFO L124 PetriNetUnfolderBase]: 18205/25742 cut-off events. [2025-02-08 08:38:12,190 INFO L125 PetriNetUnfolderBase]: For 6979/6979 co-relation queries the response was YES. [2025-02-08 08:38:12,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58460 conditions, 25742 events. 18205/25742 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 150701 event pairs, 9749 based on Foata normal form. 630/22246 useless extension candidates. Maximal degree in co-relation 38481. Up to 10410 conditions per place. [2025-02-08 08:38:12,253 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 111 selfloop transitions, 11 changer transitions 4/130 dead transitions. [2025-02-08 08:38:12,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 640 flow [2025-02-08 08:38:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:38:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:38:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2025-02-08 08:38:12,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2025-02-08 08:38:12,254 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 206 flow. Second operand 8 states and 219 transitions. [2025-02-08 08:38:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 640 flow [2025-02-08 08:38:12,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 618 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-02-08 08:38:12,259 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 257 flow [2025-02-08 08:38:12,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2025-02-08 08:38:12,259 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2025-02-08 08:38:12,259 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 257 flow [2025-02-08 08:38:12,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 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 08:38:12,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:12,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:38:12,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:12,461 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:12,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2138693377, now seen corresponding path program 2 times [2025-02-08 08:38:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666154416] [2025-02-08 08:38:12,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:38:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:12,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-08 08:38:12,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 14 statements. [2025-02-08 08:38:12,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:38:12,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:38:12,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:12,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666154416] [2025-02-08 08:38:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666154416] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:12,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:12,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535022297] [2025-02-08 08:38:12,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:12,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:12,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:12,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:12,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:12,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:12,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 08:38:12,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:12,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:12,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:13,613 INFO L124 PetriNetUnfolderBase]: 17173/24235 cut-off events. [2025-02-08 08:38:13,613 INFO L125 PetriNetUnfolderBase]: For 8850/8850 co-relation queries the response was YES. [2025-02-08 08:38:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58561 conditions, 24235 events. 17173/24235 cut-off events. For 8850/8850 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 146695 event pairs, 4792 based on Foata normal form. 0/20726 useless extension candidates. Maximal degree in co-relation 36779. Up to 16872 conditions per place. [2025-02-08 08:38:13,701 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 86 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2025-02-08 08:38:13,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 98 transitions, 570 flow [2025-02-08 08:38:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-02-08 08:38:13,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2025-02-08 08:38:13,703 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 257 flow. Second operand 5 states and 133 transitions. [2025-02-08 08:38:13,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 98 transitions, 570 flow [2025-02-08 08:38:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 98 transitions, 540 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-02-08 08:38:13,714 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 250 flow [2025-02-08 08:38:13,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2025-02-08 08:38:13,715 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2025-02-08 08:38:13,715 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 250 flow [2025-02-08 08:38:13,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 08:38:13,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:13,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:13,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:38:13,715 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:13,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1465645396, now seen corresponding path program 2 times [2025-02-08 08:38:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958486286] [2025-02-08 08:38:13,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:38:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:13,720 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-02-08 08:38:13,726 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 15 statements. [2025-02-08 08:38:13,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:38:13,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:38:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958486286] [2025-02-08 08:38:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958486286] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:38:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845255962] [2025-02-08 08:38:13,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:13,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:38:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:13,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:38:13,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:38:13,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:13,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 08:38:13,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:13,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:13,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:14,874 INFO L124 PetriNetUnfolderBase]: 15710/22305 cut-off events. [2025-02-08 08:38:14,874 INFO L125 PetriNetUnfolderBase]: For 9200/9200 co-relation queries the response was YES. [2025-02-08 08:38:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52940 conditions, 22305 events. 15710/22305 cut-off events. For 9200/9200 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 130700 event pairs, 7419 based on Foata normal form. 0/19244 useless extension candidates. Maximal degree in co-relation 31129. Up to 16987 conditions per place. [2025-02-08 08:38:14,969 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 72 selfloop transitions, 9 changer transitions 10/95 dead transitions. [2025-02-08 08:38:14,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 544 flow [2025-02-08 08:38:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:38:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:38:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2025-02-08 08:38:14,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2025-02-08 08:38:14,971 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 250 flow. Second operand 5 states and 132 transitions. [2025-02-08 08:38:14,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 544 flow [2025-02-08 08:38:14,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 520 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:38:14,982 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 261 flow [2025-02-08 08:38:14,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2025-02-08 08:38:14,982 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2025-02-08 08:38:14,982 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 261 flow [2025-02-08 08:38:14,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 08:38:14,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:14,983 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:14,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:38:14,983 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:14,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash 463743730, now seen corresponding path program 1 times [2025-02-08 08:38:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:14,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919377206] [2025-02-08 08:38:14,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:14,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:14,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:38:14,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:38:14,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:14,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:38:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919377206] [2025-02-08 08:38:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919377206] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:38:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619914225] [2025-02-08 08:38:15,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:15,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:38:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:38:15,119 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 08:38:15,120 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 08:38:15,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:38:15,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:38:15,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:15,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:15,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:38:15,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:38:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:38:15,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:38:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:38:15,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619914225] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:38:15,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:38:15,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2025-02-08 08:38:15,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312396068] [2025-02-08 08:38:15,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:38:15,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:38:15,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:15,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:38:15,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:38:15,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 261 flow. Second operand has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 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 08:38:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:17,280 INFO L124 PetriNetUnfolderBase]: 22693/32176 cut-off events. [2025-02-08 08:38:17,280 INFO L125 PetriNetUnfolderBase]: For 11598/11598 co-relation queries the response was YES. [2025-02-08 08:38:17,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76378 conditions, 32176 events. 22693/32176 cut-off events. For 11598/11598 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 196464 event pairs, 6906 based on Foata normal form. 160/28270 useless extension candidates. Maximal degree in co-relation 54495. Up to 9877 conditions per place. [2025-02-08 08:38:17,414 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 125 selfloop transitions, 18 changer transitions 50/197 dead transitions. [2025-02-08 08:38:17,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 197 transitions, 1051 flow [2025-02-08 08:38:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:38:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:38:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2025-02-08 08:38:17,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38257575757575757 [2025-02-08 08:38:17,415 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 261 flow. Second operand 11 states and 303 transitions. [2025-02-08 08:38:17,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 197 transitions, 1051 flow [2025-02-08 08:38:17,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 197 transitions, 1029 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-08 08:38:17,430 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 361 flow [2025-02-08 08:38:17,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=361, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2025-02-08 08:38:17,431 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 27 predicate places. [2025-02-08 08:38:17,431 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 361 flow [2025-02-08 08:38:17,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 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 08:38:17,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:17,431 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:17,437 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 08:38:17,632 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,SelfDestructingSolverStorable10 [2025-02-08 08:38:17,632 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:17,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 589709481, now seen corresponding path program 2 times [2025-02-08 08:38:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379333078] [2025-02-08 08:38:17,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:38:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:17,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 08:38:17,651 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 23 statements. [2025-02-08 08:38:17,651 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:38:17,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:38:17,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:17,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379333078] [2025-02-08 08:38:17,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379333078] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:17,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:38:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627215821] [2025-02-08 08:38:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:17,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:38:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:17,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:38:17,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:38:17,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:17,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 08:38:17,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:17,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:17,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:19,009 INFO L124 PetriNetUnfolderBase]: 19599/27871 cut-off events. [2025-02-08 08:38:19,009 INFO L125 PetriNetUnfolderBase]: For 14216/14216 co-relation queries the response was YES. [2025-02-08 08:38:19,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68599 conditions, 27871 events. 19599/27871 cut-off events. For 14216/14216 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 167809 event pairs, 7216 based on Foata normal form. 160/24207 useless extension candidates. Maximal degree in co-relation 68582. Up to 23564 conditions per place. [2025-02-08 08:38:19,192 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 59 selfloop transitions, 9 changer transitions 38/110 dead transitions. [2025-02-08 08:38:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 110 transitions, 685 flow [2025-02-08 08:38:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:38:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:38:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2025-02-08 08:38:19,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3472222222222222 [2025-02-08 08:38:19,194 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 361 flow. Second operand 6 states and 150 transitions. [2025-02-08 08:38:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 110 transitions, 685 flow [2025-02-08 08:38:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 671 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-02-08 08:38:19,236 INFO L231 Difference]: Finished difference. Result has 95 places, 61 transitions, 315 flow [2025-02-08 08:38:19,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=95, PETRI_TRANSITIONS=61} [2025-02-08 08:38:19,236 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2025-02-08 08:38:19,237 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 61 transitions, 315 flow [2025-02-08 08:38:19,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 08:38:19,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:19,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:19,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:38:19,237 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:19,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 520486420, now seen corresponding path program 1 times [2025-02-08 08:38:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:19,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118373458] [2025-02-08 08:38:19,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:19,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 08:38:19,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:38:19,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:19,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:19,274 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 08:38:19,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118373458] [2025-02-08 08:38:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118373458] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:19,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:19,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:38:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603797823] [2025-02-08 08:38:19,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:19,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:19,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:19,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:19,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:19,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 61 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 08:38:19,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:19,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:19,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:20,246 INFO L124 PetriNetUnfolderBase]: 15749/22734 cut-off events. [2025-02-08 08:38:20,246 INFO L125 PetriNetUnfolderBase]: For 10298/10298 co-relation queries the response was YES. [2025-02-08 08:38:20,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55941 conditions, 22734 events. 15749/22734 cut-off events. For 10298/10298 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 139180 event pairs, 4424 based on Foata normal form. 4/22104 useless extension candidates. Maximal degree in co-relation 55924. Up to 10028 conditions per place. [2025-02-08 08:38:20,372 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 80 selfloop transitions, 3 changer transitions 37/124 dead transitions. [2025-02-08 08:38:20,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 834 flow [2025-02-08 08:38:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2025-02-08 08:38:20,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-02-08 08:38:20,374 INFO L175 Difference]: Start difference. First operand has 95 places, 61 transitions, 315 flow. Second operand 4 states and 128 transitions. [2025-02-08 08:38:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 834 flow [2025-02-08 08:38:20,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 798 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:38:20,397 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 312 flow [2025-02-08 08:38:20,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2025-02-08 08:38:20,398 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2025-02-08 08:38:20,398 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 312 flow [2025-02-08 08:38:20,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 08:38:20,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:38:20,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:20,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:38:20,398 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2025-02-08 08:38:20,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:38:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1821263601, now seen corresponding path program 1 times [2025-02-08 08:38:20,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:38:20,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093850813] [2025-02-08 08:38:20,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:38:20,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:38:20,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-08 08:38:20,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-08 08:38:20,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:38:20,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:38:20,447 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 08:38:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:38:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093850813] [2025-02-08 08:38:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093850813] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:38:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:38:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:38:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431674960] [2025-02-08 08:38:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:38:20,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:38:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:38:20,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:38:20,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:38:20,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2025-02-08 08:38:20,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 08:38:20,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:38:20,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2025-02-08 08:38:20,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:38:21,180 INFO L124 PetriNetUnfolderBase]: 9185/13257 cut-off events. [2025-02-08 08:38:21,181 INFO L125 PetriNetUnfolderBase]: For 8376/8379 co-relation queries the response was YES. [2025-02-08 08:38:21,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33710 conditions, 13257 events. 9185/13257 cut-off events. For 8376/8379 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 75854 event pairs, 1116 based on Foata normal form. 4/12869 useless extension candidates. Maximal degree in co-relation 33694. Up to 9864 conditions per place. [2025-02-08 08:38:21,230 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2025-02-08 08:38:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 643 flow [2025-02-08 08:38:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:38:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:38:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-02-08 08:38:21,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-02-08 08:38:21,232 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 312 flow. Second operand 4 states and 108 transitions. [2025-02-08 08:38:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 643 flow [2025-02-08 08:38:21,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 96 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:38:21,241 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2025-02-08 08:38:21,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2025-02-08 08:38:21,241 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2025-02-08 08:38:21,241 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2025-02-08 08:38:21,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 08:38:21,243 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2025-02-08 08:38:21,243 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (13 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork3Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork3Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2025-02-08 08:38:21,244 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2025-02-08 08:38:21,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:38:21,245 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:38:21,248 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:38:21,248 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:38:21,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:38:21 BasicIcfg [2025-02-08 08:38:21,252 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:38:21,252 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:38:21,252 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:38:21,253 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:38:21,253 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:37:59" (3/4) ... [2025-02-08 08:38:21,254 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 08:38:21,256 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 08:38:21,256 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 08:38:21,256 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 08:38:21,256 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread4 [2025-02-08 08:38:21,259 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 80 nodes and edges [2025-02-08 08:38:21,260 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 37 nodes and edges [2025-02-08 08:38:21,260 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2025-02-08 08:38:21,260 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-08 08:38:21,322 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 08:38:21,322 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 08:38:21,323 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:38:21,323 INFO L158 Benchmark]: Toolchain (without parser) took 22347.91ms. Allocated memory was 167.8MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 122.5MB in the beginning and 3.4GB in the end (delta: -3.3GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. [2025-02-08 08:38:21,324 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 120.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:38:21,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.39ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 109.8MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:38:21,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.42ms. Allocated memory is still 167.8MB. Free memory was 109.8MB in the beginning and 107.6MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:38:21,326 INFO L158 Benchmark]: Boogie Preprocessor took 46.01ms. Allocated memory is still 167.8MB. Free memory was 107.6MB in the beginning and 105.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:38:21,326 INFO L158 Benchmark]: IcfgBuilder took 713.79ms. Allocated memory is still 167.8MB. Free memory was 105.5MB in the beginning and 38.0MB in the end (delta: 67.5MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2025-02-08 08:38:21,327 INFO L158 Benchmark]: TraceAbstraction took 21298.57ms. Allocated memory was 167.8MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 37.2MB in the beginning and 3.4GB in the end (delta: -3.4GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2025-02-08 08:38:21,327 INFO L158 Benchmark]: Witness Printer took 70.15ms. Allocated memory is still 6.0GB. Free memory was 3.4GB in the beginning and 3.4GB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:38:21,328 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 120.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.39ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 109.8MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.42ms. Allocated memory is still 167.8MB. Free memory was 109.8MB in the beginning and 107.6MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.01ms. Allocated memory is still 167.8MB. Free memory was 107.6MB in the beginning and 105.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 713.79ms. Allocated memory is still 167.8MB. Free memory was 105.5MB in the beginning and 38.0MB in the end (delta: 67.5MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * TraceAbstraction took 21298.57ms. Allocated memory was 167.8MB in the beginning and 6.0GB in the end (delta: 5.9GB). Free memory was 37.2MB in the beginning and 3.4GB in the end (delta: -3.4GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * Witness Printer took 70.15ms. Allocated memory is still 6.0GB. Free memory was 3.4GB in the beginning and 3.4GB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 122]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 113 locations, 22 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.2s, OverallIterations: 14, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1079 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1042 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3693 IncrementalHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 4 mSDtfsCounter, 3693 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=361occurred in iteration=11, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 263 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 292 ConstructedInterpolants, 0 QuantifiedInterpolants, 2750 SizeOfPredicates, 6 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 22 InterpolantComputations, 10 PerfectInterpolantSequences, 53/95 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 08:38:21,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE