./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:34:32,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:34:32,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:34:32,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:34:32,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:34:32,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:34:32,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:34:32,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:34:32,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:34:32,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:34:32,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:34:32,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:34:32,282 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:34:32,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:34:32,282 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:34:32,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:34:32,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:34:32,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:34:32,283 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:34:32,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:34:32,283 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 -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2025-02-08 08:34:32,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:34:32,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:34:32,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:34:32,499 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:34:32,499 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:34:32,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-02-08 08:34:33,633 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe43b74c/765df8e57fb949cb914f0df4a7c1b71b/FLAG6aecb6a26 [2025-02-08 08:34:33,878 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:34:33,879 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-02-08 08:34:33,887 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe43b74c/765df8e57fb949cb914f0df4a7c1b71b/FLAG6aecb6a26 [2025-02-08 08:34:34,194 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5fe43b74c/765df8e57fb949cb914f0df4a7c1b71b [2025-02-08 08:34:34,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:34:34,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:34:34,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:34:34,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:34:34,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:34:34,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f10b51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34, skipping insertion in model container [2025-02-08 08:34:34,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,214 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:34:34,338 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 08:34:34,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:34:34,349 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:34:34,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:34:34,391 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:34:34,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34 WrapperNode [2025-02-08 08:34:34,391 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:34:34,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:34:34,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:34:34,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:34:34,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,419 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 251 [2025-02-08 08:34:34,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:34:34,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:34:34,420 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:34:34,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:34:34,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,428 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,447 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-08 08:34:34,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,455 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:34:34,462 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:34:34,462 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:34:34,462 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:34:34,463 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (1/1) ... [2025-02-08 08:34:34,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:34:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:34,484 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 08:34:34,486 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 08:34:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:34:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:34:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:34:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:34:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:34:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:34:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:34:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:34:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:34:34,502 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 08:34:34,571 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:34:34,572 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:34:34,666 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L56: havoc #t~post4#1; [2025-02-08 08:34:34,666 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L56-1: ~i~0#1 := 1 + #t~post4#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L56-2: #t~post4#1 := ~i~0#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54: havoc #t~ret3#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-1: havoc #t~mem2#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-2: havoc #t~mem1#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-3: ~result_7~0 := #t~ret3#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret3#1 && #t~ret3#1 <= 2147483647; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L54-7: #t~ret3#1 := minus_#res#1; [2025-02-08 08:34:34,667 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L55: ~stop~0#1 := (if 0 == (if 0 != ~result_7~0 then 1 else 0) then 0 else 1); [2025-02-08 08:34:34,735 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-3: ~result_10~0 := #t~ret7#1; [2025-02-08 08:34:34,735 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret7#1 && #t~ret7#1 <= 2147483647; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-7: #t~ret7#1 := minus_#res#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L69: ~stop~1#1 := (if 0 == (if 0 != ~result_10~0 then 1 else 0) then 0 else 1); [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L70: havoc #t~post8#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L70-1: ~i~1#1 := 1 + #t~post8#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L70-2: #t~post8#1 := ~i~1#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68: havoc #t~ret7#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-1: havoc #t~mem6#1; [2025-02-08 08:34:34,737 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L68-2: havoc #t~mem5#1; [2025-02-08 08:34:34,799 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82: havoc #t~ret11#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-1: havoc #t~mem10#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-2: havoc #t~mem9#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-3: ~result_13~0 := #t~ret11#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-4: assume { :end_inline_minus } true;assume -2147483648 <= #t~ret11#1 && #t~ret11#1 <= 2147483647; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-5: havoc minus_#in~a#1, minus_#in~b#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-6: havoc minus_~a#1, minus_~b#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L82-7: #t~ret11#1 := minus_#res#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L83: ~stop~2#1 := (if 0 == (if 0 != ~result_13~0 then 1 else 0) then 0 else 1); [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L84: havoc #t~post12#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L84-1: ~i~2#1 := 1 + #t~post12#1; [2025-02-08 08:34:34,800 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L84-2: #t~post12#1 := ~i~2#1; [2025-02-08 08:34:34,939 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:34:34,939 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:34:35,139 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:34:35,139 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:34:35,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:34:35 BoogieIcfgContainer [2025-02-08 08:34:35,140 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:34:35,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:34:35,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:34:35,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:34:35,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:34:34" (1/3) ... [2025-02-08 08:34:35,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67461d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:34:35, skipping insertion in model container [2025-02-08 08:34:35,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:34:34" (2/3) ... [2025-02-08 08:34:35,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67461d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:34:35, skipping insertion in model container [2025-02-08 08:34:35,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:34:35" (3/3) ... [2025-02-08 08:34:35,147 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2025-02-08 08:34:35,158 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:34:35,159 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 58 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2025-02-08 08:34:35,159 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:34:35,206 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:34:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 60 transitions, 141 flow [2025-02-08 08:34:35,250 INFO L124 PetriNetUnfolderBase]: 3/57 cut-off events. [2025-02-08 08:34:35,252 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:34:35,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 3/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2025-02-08 08:34:35,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 60 transitions, 141 flow [2025-02-08 08:34:35,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 56 transitions, 130 flow [2025-02-08 08:34:35,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:34:35,276 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;@6c31ad6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:34:35,276 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2025-02-08 08:34:35,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:34:35,279 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:34:35,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:34:35,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:35,279 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:34:35,279 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:35,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash 722492, now seen corresponding path program 1 times [2025-02-08 08:34:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:35,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380861669] [2025-02-08 08:34:35,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:35,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:34:35,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:34:35,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:35,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:35,453 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 08:34:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380861669] [2025-02-08 08:34:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380861669] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:35,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:35,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:34:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005714075] [2025-02-08 08:34:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:35,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:34:35,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:35,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:34:35,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:34:35,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-08 08:34:35,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:35,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:35,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-08 08:34:35,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:35,723 INFO L124 PetriNetUnfolderBase]: 309/756 cut-off events. [2025-02-08 08:34:35,723 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2025-02-08 08:34:35,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 756 events. 309/756 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4962 event pairs, 306 based on Foata normal form. 1/613 useless extension candidates. Maximal degree in co-relation 1178. Up to 498 conditions per place. [2025-02-08 08:34:35,732 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2025-02-08 08:34:35,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 178 flow [2025-02-08 08:34:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:34:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:34:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2025-02-08 08:34:35,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-02-08 08:34:35,742 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2025-02-08 08:34:35,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 178 flow [2025-02-08 08:34:35,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:35,752 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 112 flow [2025-02-08 08:34:35,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2025-02-08 08:34:35,756 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2025-02-08 08:34:35,756 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 112 flow [2025-02-08 08:34:35,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:35,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:35,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:34:35,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:34:35,757 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:35,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash 722493, now seen corresponding path program 1 times [2025-02-08 08:34:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33373132] [2025-02-08 08:34:35,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:35,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:34:35,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:34:35,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:35,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:35,938 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 08:34:35,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:35,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33373132] [2025-02-08 08:34:35,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33373132] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:35,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:35,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:34:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376910754] [2025-02-08 08:34:35,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:35,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:34:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:35,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:34:35,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:34:35,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-08 08:34:35,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:35,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:35,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-08 08:34:35,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:36,154 INFO L124 PetriNetUnfolderBase]: 312/765 cut-off events. [2025-02-08 08:34:36,154 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:34:36,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 765 events. 312/765 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4987 event pairs, 306 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 1260. Up to 511 conditions per place. [2025-02-08 08:34:36,161 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2025-02-08 08:34:36,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 214 flow [2025-02-08 08:34:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:34:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:34:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-02-08 08:34:36,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2025-02-08 08:34:36,164 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2025-02-08 08:34:36,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 214 flow [2025-02-08 08:34:36,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:34:36,166 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 166 flow [2025-02-08 08:34:36,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2025-02-08 08:34:36,167 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2025-02-08 08:34:36,167 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 166 flow [2025-02-08 08:34:36,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:36,168 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:36,168 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:34:36,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:34:36,168 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:36,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 694337697, now seen corresponding path program 1 times [2025-02-08 08:34:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212796838] [2025-02-08 08:34:36,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:36,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:34:36,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:34:36,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:36,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:36,379 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 08:34:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212796838] [2025-02-08 08:34:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212796838] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705052170] [2025-02-08 08:34:36,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:36,385 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 08:34:36,387 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 08:34:36,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:34:36,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:34:36,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:36,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:36,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:34:36,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:36,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:34:36,535 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 08:34:36,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:36,595 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 08:34:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705052170] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:36,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-02-08 08:34:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116405035] [2025-02-08 08:34:36,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:36,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:34:36,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:36,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:34:36,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-02-08 08:34:36,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-08 08:34:36,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:36,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:36,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-08 08:34:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:37,015 INFO L124 PetriNetUnfolderBase]: 321/792 cut-off events. [2025-02-08 08:34:37,015 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-02-08 08:34:37,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 792 events. 321/792 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5157 event pairs, 306 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1260. Up to 514 conditions per place. [2025-02-08 08:34:37,019 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 43 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2025-02-08 08:34:37,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 410 flow [2025-02-08 08:34:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:34:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:34:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2025-02-08 08:34:37,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2025-02-08 08:34:37,020 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 166 flow. Second operand 6 states and 233 transitions. [2025-02-08 08:34:37,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 410 flow [2025-02-08 08:34:37,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:34:37,023 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 327 flow [2025-02-08 08:34:37,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2025-02-08 08:34:37,023 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2025-02-08 08:34:37,024 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 327 flow [2025-02-08 08:34:37,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:37,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:37,024 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:37,030 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 08:34:37,228 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 08:34:37,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:37,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1957460019, now seen corresponding path program 1 times [2025-02-08 08:34:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:37,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819210737] [2025-02-08 08:34:37,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:37,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:34:37,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:34:37,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:37,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:37,335 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 08:34:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819210737] [2025-02-08 08:34:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819210737] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:37,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:37,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:34:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009050683] [2025-02-08 08:34:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:37,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:34:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:37,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:34:37,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:34:37,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-02-08 08:34:37,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:37,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:37,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-02-08 08:34:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:37,469 INFO L124 PetriNetUnfolderBase]: 318/789 cut-off events. [2025-02-08 08:34:37,469 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2025-02-08 08:34:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 789 events. 318/789 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5061 event pairs, 306 based on Foata normal form. 3/651 useless extension candidates. Maximal degree in co-relation 1339. Up to 528 conditions per place. [2025-02-08 08:34:37,474 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 41 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2025-02-08 08:34:37,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 425 flow [2025-02-08 08:34:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:34:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:34:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2025-02-08 08:34:37,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2025-02-08 08:34:37,475 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 327 flow. Second operand 3 states and 125 transitions. [2025-02-08 08:34:37,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 425 flow [2025-02-08 08:34:37,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 389 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-02-08 08:34:37,478 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 301 flow [2025-02-08 08:34:37,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2025-02-08 08:34:37,479 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2025-02-08 08:34:37,479 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 301 flow [2025-02-08 08:34:37,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:37,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:37,479 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-02-08 08:34:37,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:34:37,479 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:37,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1053509171, now seen corresponding path program 2 times [2025-02-08 08:34:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727499897] [2025-02-08 08:34:37,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:37,490 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:34:37,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:34:37,499 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:37,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:34:37,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:37,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727499897] [2025-02-08 08:34:37,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727499897] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:37,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284806961] [2025-02-08 08:34:37,692 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:37,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:37,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:37,694 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 08:34:37,695 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 08:34:37,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-08 08:34:37,747 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:34:37,747 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:34:37,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:37,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-08 08:34:37,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:37,766 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 08:34:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:34:37,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:34:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284806961] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:38,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:38,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-02-08 08:34:38,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275471723] [2025-02-08 08:34:38,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:38,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-08 08:34:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:38,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-08 08:34:38,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:34:38,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-08 08:34:38,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 301 flow. Second operand has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:38,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:38,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-08 08:34:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:38,775 INFO L124 PetriNetUnfolderBase]: 318/786 cut-off events. [2025-02-08 08:34:38,776 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2025-02-08 08:34:38,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 786 events. 318/786 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5033 event pairs, 306 based on Foata normal form. 3/648 useless extension candidates. Maximal degree in co-relation 1337. Up to 501 conditions per place. [2025-02-08 08:34:38,781 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 22 selfloop transitions, 40 changer transitions 0/81 dead transitions. [2025-02-08 08:34:38,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 81 transitions, 419 flow [2025-02-08 08:34:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:34:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-08 08:34:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2025-02-08 08:34:38,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2025-02-08 08:34:38,782 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 301 flow. Second operand 11 states and 351 transitions. [2025-02-08 08:34:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 81 transitions, 419 flow [2025-02-08 08:34:38,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 348 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:38,786 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 310 flow [2025-02-08 08:34:38,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=310, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2025-02-08 08:34:38,787 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2025-02-08 08:34:38,789 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 310 flow [2025-02-08 08:34:38,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:38,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:38,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:38,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:38,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:38,990 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:38,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1255097293, now seen corresponding path program 1 times [2025-02-08 08:34:38,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282698216] [2025-02-08 08:34:38,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:38,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:38,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:34:39,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:34:39,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:39,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:34:39,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282698216] [2025-02-08 08:34:39,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282698216] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483944619] [2025-02-08 08:34:39,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:39,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:39,072 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 08:34:39,074 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 08:34:39,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-08 08:34:39,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-08 08:34:39,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:39,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:39,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:34:39,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:34:39,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:34:39,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483944619] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:39,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:39,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-02-08 08:34:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396337829] [2025-02-08 08:34:39,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:39,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 08:34:39,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:39,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 08:34:39,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:34:39,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-02-08 08:34:39,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:39,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:39,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-02-08 08:34:39,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:39,328 INFO L124 PetriNetUnfolderBase]: 309/777 cut-off events. [2025-02-08 08:34:39,328 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:34:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 777 events. 309/777 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4927 event pairs, 306 based on Foata normal form. 9/645 useless extension candidates. Maximal degree in co-relation 1260. Up to 504 conditions per place. [2025-02-08 08:34:39,333 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 21 changer transitions 0/72 dead transitions. [2025-02-08 08:34:39,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 362 flow [2025-02-08 08:34:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:34:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:34:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2025-02-08 08:34:39,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2025-02-08 08:34:39,334 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 310 flow. Second operand 6 states and 233 transitions. [2025-02-08 08:34:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 362 flow [2025-02-08 08:34:39,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 322 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-02-08 08:34:39,336 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 258 flow [2025-02-08 08:34:39,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2025-02-08 08:34:39,337 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2025-02-08 08:34:39,337 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 258 flow [2025-02-08 08:34:39,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:39,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:39,337 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:39,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:34:39,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:39,538 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:39,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash -383085772, now seen corresponding path program 1 times [2025-02-08 08:34:39,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:39,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583476357] [2025-02-08 08:34:39,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:39,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:34:39,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:34:39,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:39,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-08 08:34:39,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:39,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583476357] [2025-02-08 08:34:39,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583476357] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:39,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646320085] [2025-02-08 08:34:39,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:39,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:39,690 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 08:34:39,691 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 08:34:39,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:34:39,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:34:39,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:39,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:39,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:34:39,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-08 08:34:39,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-08 08:34:39,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646320085] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:39,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:39,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2025-02-08 08:34:39,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439841219] [2025-02-08 08:34:39,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:39,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 08:34:39,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:39,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 08:34:39,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:34:39,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-02-08 08:34:39,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 258 flow. Second operand has 17 states, 17 states have (on average 31.58823529411765) internal successors, (537), 17 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:39,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:39,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-02-08 08:34:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:40,091 INFO L124 PetriNetUnfolderBase]: 309/783 cut-off events. [2025-02-08 08:34:40,091 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-02-08 08:34:40,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 783 events. 309/783 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4932 event pairs, 306 based on Foata normal form. 1/641 useless extension candidates. Maximal degree in co-relation 1262. Up to 504 conditions per place. [2025-02-08 08:34:40,094 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2025-02-08 08:34:40,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 78 transitions, 412 flow [2025-02-08 08:34:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:34:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:34:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 294 transitions. [2025-02-08 08:34:40,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2025-02-08 08:34:40,096 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 258 flow. Second operand 8 states and 294 transitions. [2025-02-08 08:34:40,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 78 transitions, 412 flow [2025-02-08 08:34:40,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 358 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-08 08:34:40,098 INFO L231 Difference]: Finished difference. Result has 67 places, 78 transitions, 314 flow [2025-02-08 08:34:40,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=67, PETRI_TRANSITIONS=78} [2025-02-08 08:34:40,098 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2025-02-08 08:34:40,098 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 78 transitions, 314 flow [2025-02-08 08:34:40,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.58823529411765) internal successors, (537), 17 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:40,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:40,099 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:40,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:40,305 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,SelfDestructingSolverStorable6 [2025-02-08 08:34:40,305 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:40,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1069500724, now seen corresponding path program 2 times [2025-02-08 08:34:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:40,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661823163] [2025-02-08 08:34:40,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:40,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-08 08:34:40,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-02-08 08:34:40,324 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:34:40,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 08:34:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661823163] [2025-02-08 08:34:40,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661823163] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:40,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:34:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350634573] [2025-02-08 08:34:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:40,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:34:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:40,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:34:40,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:34:40,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-02-08 08:34:40,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:40,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:40,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-02-08 08:34:40,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:40,761 INFO L124 PetriNetUnfolderBase]: 479/1046 cut-off events. [2025-02-08 08:34:40,761 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:34:40,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 1046 events. 479/1046 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6673 event pairs, 49 based on Foata normal form. 0/966 useless extension candidates. Maximal degree in co-relation 1788. Up to 654 conditions per place. [2025-02-08 08:34:40,765 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 69 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2025-02-08 08:34:40,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 484 flow [2025-02-08 08:34:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:34:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:34:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2025-02-08 08:34:40,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2025-02-08 08:34:40,766 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 314 flow. Second operand 6 states and 200 transitions. [2025-02-08 08:34:40,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 484 flow [2025-02-08 08:34:40,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:40,768 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 296 flow [2025-02-08 08:34:40,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2025-02-08 08:34:40,768 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2025-02-08 08:34:40,768 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 296 flow [2025-02-08 08:34:40,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:40,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:40,768 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:40,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:34:40,769 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:40,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1069500723, now seen corresponding path program 2 times [2025-02-08 08:34:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017979192] [2025-02-08 08:34:40,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:34:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:40,780 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-08 08:34:40,791 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-02-08 08:34:40,791 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 08:34:40,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 08:34:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017979192] [2025-02-08 08:34:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017979192] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:40,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:40,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:34:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41655338] [2025-02-08 08:34:40,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:40,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:34:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:40,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:34:40,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:34:40,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-02-08 08:34:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:40,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:40,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-02-08 08:34:40,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:41,006 INFO L124 PetriNetUnfolderBase]: 479/1008 cut-off events. [2025-02-08 08:34:41,007 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-02-08 08:34:41,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 1008 events. 479/1008 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5886 event pairs, 476 based on Foata normal form. 0/925 useless extension candidates. Maximal degree in co-relation 1801. Up to 754 conditions per place. [2025-02-08 08:34:41,010 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 58 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2025-02-08 08:34:41,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 414 flow [2025-02-08 08:34:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:34:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:34:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-02-08 08:34:41,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2025-02-08 08:34:41,014 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 296 flow. Second operand 5 states and 143 transitions. [2025-02-08 08:34:41,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 414 flow [2025-02-08 08:34:41,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 407 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:41,016 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 291 flow [2025-02-08 08:34:41,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2025-02-08 08:34:41,016 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2025-02-08 08:34:41,016 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 291 flow [2025-02-08 08:34:41,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:41,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:41,017 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:41,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:34:41,017 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:41,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1205215271, now seen corresponding path program 1 times [2025-02-08 08:34:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:41,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916008111] [2025-02-08 08:34:41,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:41,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-08 08:34:41,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-08 08:34:41,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:41,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-08 08:34:41,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:41,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916008111] [2025-02-08 08:34:41,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916008111] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:41,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:41,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:34:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517768715] [2025-02-08 08:34:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:41,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:34:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:41,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:34:41,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:34:41,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2025-02-08 08:34:41,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:41,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:41,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2025-02-08 08:34:41,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:41,312 INFO L124 PetriNetUnfolderBase]: 394/861 cut-off events. [2025-02-08 08:34:41,312 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-02-08 08:34:41,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 861 events. 394/861 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5013 event pairs, 391 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 1527. Up to 626 conditions per place. [2025-02-08 08:34:41,315 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 57 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2025-02-08 08:34:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 73 transitions, 407 flow [2025-02-08 08:34:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:34:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:34:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-08 08:34:41,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-02-08 08:34:41,315 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 291 flow. Second operand 5 states and 147 transitions. [2025-02-08 08:34:41,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 73 transitions, 407 flow [2025-02-08 08:34:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:34:41,317 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 288 flow [2025-02-08 08:34:41,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2025-02-08 08:34:41,317 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2025-02-08 08:34:41,317 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 288 flow [2025-02-08 08:34:41,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:41,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:41,317 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:41,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:34:41,317 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:41,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1205215270, now seen corresponding path program 1 times [2025-02-08 08:34:41,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:41,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373229324] [2025-02-08 08:34:41,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:41,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:41,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-08 08:34:41,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-08 08:34:41,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:41,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-08 08:34:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373229324] [2025-02-08 08:34:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373229324] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711564526] [2025-02-08 08:34:41,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:41,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:41,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:41,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:34:41,707 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-08 08:34:41,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-08 08:34:41,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:41,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:41,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:34:41,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:41,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:34:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:34:41,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-02-08 08:34:41,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:34:41,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:34:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:41,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:42,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-02-08 08:34:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:42,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711564526] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:34:42,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:34:42,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2025-02-08 08:34:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081318719] [2025-02-08 08:34:42,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:34:42,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:34:42,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:42,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:34:42,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:34:46,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:34:50,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:34:54,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-02-08 08:34:55,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-02-08 08:34:55,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 288 flow. Second operand has 23 states, 23 states have (on average 24.26086956521739) internal successors, (558), 23 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:55,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:55,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-02-08 08:34:55,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:55,426 INFO L124 PetriNetUnfolderBase]: 309/671 cut-off events. [2025-02-08 08:34:55,426 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:34:55,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 671 events. 309/671 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3680 event pairs, 39 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 1195. Up to 415 conditions per place. [2025-02-08 08:34:55,428 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 53 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2025-02-08 08:34:55,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 450 flow [2025-02-08 08:34:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:34:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:34:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 373 transitions. [2025-02-08 08:34:55,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.444047619047619 [2025-02-08 08:34:55,430 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 288 flow. Second operand 14 states and 373 transitions. [2025-02-08 08:34:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 450 flow [2025-02-08 08:34:55,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 445 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:34:55,431 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 315 flow [2025-02-08 08:34:55,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=315, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2025-02-08 08:34:55,432 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2025-02-08 08:34:55,432 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 315 flow [2025-02-08 08:34:55,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 24.26086956521739) internal successors, (558), 23 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:55,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:55,432 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:55,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:55,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-02-08 08:34:55,636 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:55,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1255174515, now seen corresponding path program 1 times [2025-02-08 08:34:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794013945] [2025-02-08 08:34:55,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:55,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-08 08:34:55,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:34:55,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:55,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-08 08:34:55,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:55,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794013945] [2025-02-08 08:34:55,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794013945] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:55,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571119305] [2025-02-08 08:34:55,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:55,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:55,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:55,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:34:55,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-08 08:34:55,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-08 08:34:55,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:55,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:55,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-08 08:34:56,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:56,017 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 08:34:56,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:34:56,083 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:34:56,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-08 08:34:56,095 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:34:56,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:34:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:56,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571119305] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:34:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2025-02-08 08:34:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576275340] [2025-02-08 08:34:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:56,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:34:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:56,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:34:56,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:34:56,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-02-08 08:34:56,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:56,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:56,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-02-08 08:34:56,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:57,003 INFO L124 PetriNetUnfolderBase]: 394/842 cut-off events. [2025-02-08 08:34:57,004 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2025-02-08 08:34:57,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 842 events. 394/842 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4864 event pairs, 48 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 1562. Up to 525 conditions per place. [2025-02-08 08:34:57,008 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 66 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2025-02-08 08:34:57,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 478 flow [2025-02-08 08:34:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:34:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:34:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2025-02-08 08:34:57,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2025-02-08 08:34:57,009 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 315 flow. Second operand 6 states and 203 transitions. [2025-02-08 08:34:57,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 478 flow [2025-02-08 08:34:57,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:34:57,011 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 318 flow [2025-02-08 08:34:57,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2025-02-08 08:34:57,013 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2025-02-08 08:34:57,013 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 318 flow [2025-02-08 08:34:57,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:57,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:57,014 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:57,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:34:57,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-08 08:34:57,215 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:57,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:57,215 INFO L85 PathProgramCache]: Analyzing trace with hash 255704964, now seen corresponding path program 1 times [2025-02-08 08:34:57,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:57,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160132682] [2025-02-08 08:34:57,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:57,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:57,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-08 08:34:57,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:34:57,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:57,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160132682] [2025-02-08 08:34:57,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160132682] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436574784] [2025-02-08 08:34:57,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:57,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:57,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:57,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:34:57,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-08 08:34:57,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:34:57,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:57,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:57,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-08 08:34:57,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:57,657 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 08:34:57,782 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:34:57,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-08 08:34:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:34:57,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:34:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 08:34:57,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436574784] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:57,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:34:57,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 10] total 19 [2025-02-08 08:34:57,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133068637] [2025-02-08 08:34:57,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:57,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:34:57,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:57,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:34:57,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:34:57,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-02-08 08:34:57,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:57,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:57,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-02-08 08:34:57,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:58,128 INFO L124 PetriNetUnfolderBase]: 309/711 cut-off events. [2025-02-08 08:34:58,129 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-02-08 08:34:58,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 711 events. 309/711 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4110 event pairs, 48 based on Foata normal form. 0/683 useless extension candidates. Maximal degree in co-relation 1322. Up to 396 conditions per place. [2025-02-08 08:34:58,131 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 66 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2025-02-08 08:34:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 478 flow [2025-02-08 08:34:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:34:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:34:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2025-02-08 08:34:58,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-02-08 08:34:58,133 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 318 flow. Second operand 5 states and 180 transitions. [2025-02-08 08:34:58,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 478 flow [2025-02-08 08:34:58,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 471 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:34:58,135 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 315 flow [2025-02-08 08:34:58,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2025-02-08 08:34:58,136 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2025-02-08 08:34:58,136 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 315 flow [2025-02-08 08:34:58,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:58,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:58,136 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:58,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 08:34:58,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:58,341 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:58,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:58,342 INFO L85 PathProgramCache]: Analyzing trace with hash 255704963, now seen corresponding path program 1 times [2025-02-08 08:34:58,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622052555] [2025-02-08 08:34:58,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:58,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-08 08:34:58,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-08 08:34:58,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:58,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-08 08:34:58,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622052555] [2025-02-08 08:34:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622052555] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:34:58,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:34:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:34:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524549118] [2025-02-08 08:34:58,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:34:58,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:34:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:34:58,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:34:58,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:34:58,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-02-08 08:34:58,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:58,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:34:58,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-02-08 08:34:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:34:58,535 INFO L124 PetriNetUnfolderBase]: 309/683 cut-off events. [2025-02-08 08:34:58,535 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-02-08 08:34:58,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 683 events. 309/683 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3703 event pairs, 306 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 1338. Up to 497 conditions per place. [2025-02-08 08:34:58,538 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 56 selfloop transitions, 2 changer transitions 1/68 dead transitions. [2025-02-08 08:34:58,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 429 flow [2025-02-08 08:34:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:34:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:34:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2025-02-08 08:34:58,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2025-02-08 08:34:58,539 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 315 flow. Second operand 4 states and 127 transitions. [2025-02-08 08:34:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 429 flow [2025-02-08 08:34:58,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:34:58,542 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 308 flow [2025-02-08 08:34:58,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2025-02-08 08:34:58,542 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2025-02-08 08:34:58,542 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 308 flow [2025-02-08 08:34:58,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:34:58,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:34:58,543 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:34:58,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:34:58,543 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:34:58,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:34:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -708654347, now seen corresponding path program 1 times [2025-02-08 08:34:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:34:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266024773] [2025-02-08 08:34:58,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:34:58,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 08:34:58,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:34:58,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:58,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-08 08:34:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:34:58,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266024773] [2025-02-08 08:34:58,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266024773] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:34:58,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312410234] [2025-02-08 08:34:58,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:34:58,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:34:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:34:58,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:34:58,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:34:59,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-08 08:34:59,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-08 08:34:59,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:34:59,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:34:59,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-08 08:34:59,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:34:59,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-08 08:34:59,098 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 08:34:59,233 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 08:34:59,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-08 08:34:59,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-02-08 08:34:59,468 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-02-08 08:34:59,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2025-02-08 08:35:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-08 08:35:00,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:35:00,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312410234] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:00,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:35:00,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 14] total 30 [2025-02-08 08:35:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991154701] [2025-02-08 08:35:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:00,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:35:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:00,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:35:00,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2025-02-08 08:35:00,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-02-08 08:35:00,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 308 flow. Second operand has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:00,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:00,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-02-08 08:35:00,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:01,170 INFO L124 PetriNetUnfolderBase]: 309/629 cut-off events. [2025-02-08 08:35:01,170 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-02-08 08:35:01,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 629 events. 309/629 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3099 event pairs, 90 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 1284. Up to 329 conditions per place. [2025-02-08 08:35:01,174 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 64 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2025-02-08 08:35:01,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 466 flow [2025-02-08 08:35:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:35:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:35:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2025-02-08 08:35:01,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2025-02-08 08:35:01,175 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 308 flow. Second operand 6 states and 201 transitions. [2025-02-08 08:35:01,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 466 flow [2025-02-08 08:35:01,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:35:01,177 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 311 flow [2025-02-08 08:35:01,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=311, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2025-02-08 08:35:01,177 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2025-02-08 08:35:01,177 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 311 flow [2025-02-08 08:35:01,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.272727272727273) internal successors, (322), 11 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:01,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:01,178 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:01,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:01,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-08 08:35:01,378 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:35:01,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash -493447605, now seen corresponding path program 1 times [2025-02-08 08:35:01,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:01,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570009154] [2025-02-08 08:35:01,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:01,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-08 08:35:01,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 08:35:01,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:01,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:35:01,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570009154] [2025-02-08 08:35:01,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570009154] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974093084] [2025-02-08 08:35:01,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:01,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:35:01,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:35:01,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:35:01,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-08 08:35:01,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-08 08:35:01,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:01,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:01,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-08 08:35:01,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:35:01,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-08 08:35:01,859 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-02-08 08:35:01,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-02-08 08:35:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 08:35:01,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:35:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 08:35:02,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974093084] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:35:02,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:35:02,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 10] total 18 [2025-02-08 08:35:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522916273] [2025-02-08 08:35:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:02,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:35:02,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:02,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:35:02,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2025-02-08 08:35:02,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-02-08 08:35:02,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:02,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-02-08 08:35:02,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:02,174 INFO L124 PetriNetUnfolderBase]: 237/520 cut-off events. [2025-02-08 08:35:02,175 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2025-02-08 08:35:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 520 events. 237/520 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2551 event pairs, 90 based on Foata normal form. 37/547 useless extension candidates. Maximal degree in co-relation 1070. Up to 220 conditions per place. [2025-02-08 08:35:02,177 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 60 selfloop transitions, 3 changer transitions 4/74 dead transitions. [2025-02-08 08:35:02,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 467 flow [2025-02-08 08:35:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:35:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:35:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2025-02-08 08:35:02,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2025-02-08 08:35:02,179 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 311 flow. Second operand 5 states and 178 transitions. [2025-02-08 08:35:02,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 467 flow [2025-02-08 08:35:02,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:35:02,181 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 304 flow [2025-02-08 08:35:02,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2025-02-08 08:35:02,181 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2025-02-08 08:35:02,181 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 304 flow [2025-02-08 08:35:02,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:35:02,183 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:35:02,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:35:02,384 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-02-08 08:35:02,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:35:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1754747945, now seen corresponding path program 1 times [2025-02-08 08:35:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:35:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776122339] [2025-02-08 08:35:02,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:35:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:35:02,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-08 08:35:02,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-08 08:35:02,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:35:02,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:35:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 08:35:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:35:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776122339] [2025-02-08 08:35:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776122339] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:35:02,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:35:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:35:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658940391] [2025-02-08 08:35:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:35:02,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:35:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:35:02,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:35:02,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:35:02,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-02-08 08:35:02,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:35:02,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-02-08 08:35:02,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:35:02,562 INFO L124 PetriNetUnfolderBase]: 127/313 cut-off events. [2025-02-08 08:35:02,562 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-02-08 08:35:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 313 events. 127/313 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1155 event pairs, 46 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 658. Up to 133 conditions per place. [2025-02-08 08:35:02,563 INFO L140 encePairwiseOnDemand]: 58/60 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2025-02-08 08:35:02,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 444 flow [2025-02-08 08:35:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:35:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:35:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2025-02-08 08:35:02,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-02-08 08:35:02,564 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 304 flow. Second operand 3 states and 120 transitions. [2025-02-08 08:35:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 444 flow [2025-02-08 08:35:02,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:35:02,566 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2025-02-08 08:35:02,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2025-02-08 08:35:02,566 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2025-02-08 08:35:02,566 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2025-02-08 08:35:02,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2025-02-08 08:35:02,569 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (16 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2025-02-08 08:35:02,570 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2025-02-08 08:35:02,571 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2025-02-08 08:35:02,571 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2025-02-08 08:35:02,571 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2025-02-08 08:35:02,571 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2025-02-08 08:35:02,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-08 08:35:02,571 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:35:02,578 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 08:35:02,579 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 08:35:02,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 08:35:02 BasicIcfg [2025-02-08 08:35:02,583 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 08:35:02,584 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 08:35:02,584 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 08:35:02,584 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 08:35:02,584 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:34:35" (3/4) ... [2025-02-08 08:35:02,587 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 08:35:02,589 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 08:35:02,589 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 08:35:02,589 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 08:35:02,596 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2025-02-08 08:35:02,596 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 55 nodes and edges [2025-02-08 08:35:02,596 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2025-02-08 08:35:02,596 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-08 08:35:02,672 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 08:35:02,672 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 08:35:02,672 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 08:35:02,673 INFO L158 Benchmark]: Toolchain (without parser) took 28476.58ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 111.3MB in the beginning and 295.2MB in the end (delta: -183.9MB). Peak memory consumption was 151.4MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,674 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 123.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:35:02,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.33ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 98.7MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.76ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 96.6MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,675 INFO L158 Benchmark]: Boogie Preprocessor took 39.41ms. Allocated memory is still 142.6MB. Free memory was 96.6MB in the beginning and 94.2MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 08:35:02,675 INFO L158 Benchmark]: IcfgBuilder took 677.35ms. Allocated memory is still 142.6MB. Free memory was 94.2MB in the beginning and 86.9MB in the end (delta: 7.4MB). Peak memory consumption was 65.1MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,675 INFO L158 Benchmark]: TraceAbstraction took 27442.34ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 86.9MB in the beginning and 303.6MB in the end (delta: -216.8MB). Peak memory consumption was 119.9MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,675 INFO L158 Benchmark]: Witness Printer took 88.68ms. Allocated memory is still 478.2MB. Free memory was 303.6MB in the beginning and 295.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 08:35:02,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 123.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.33ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 98.7MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.76ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 96.6MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.41ms. Allocated memory is still 142.6MB. Free memory was 96.6MB in the beginning and 94.2MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 677.35ms. Allocated memory is still 142.6MB. Free memory was 94.2MB in the beginning and 86.9MB in the end (delta: 7.4MB). Peak memory consumption was 65.1MB. Max. memory is 16.1GB. * TraceAbstraction took 27442.34ms. Allocated memory was 142.6MB in the beginning and 478.2MB in the end (delta: 335.5MB). Free memory was 86.9MB in the beginning and 303.6MB in the end (delta: -216.8MB). Peak memory consumption was 119.9MB. Max. memory is 16.1GB. * Witness Printer took 88.68ms. Allocated memory is still 478.2MB. Free memory was 303.6MB in the beginning and 295.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. 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: -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: -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: 90]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 91 locations, 35 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: 27.3s, OverallIterations: 17, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 17.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 2380 SdHoareTripleChecker+Valid, 15.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1923 mSDsluCounter, 632 SdHoareTripleChecker+Invalid, 15.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 549 mSDsCounter, 259 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6097 IncrementalHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 259 mSolverCounterUnsat, 83 mSDtfsCounter, 6097 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 636 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=3, InterpolantAutomatonStates: 99, 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: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 755 NumberOfCodeBlocks, 695 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 987 ConstructedInterpolants, 73 QuantifiedInterpolants, 10002 SizeOfPredicates, 51 NumberOfNonLiveVariables, 2598 ConjunctsInSsa, 229 ConjunctsInUnsatCore, 35 InterpolantComputations, 12 PerfectInterpolantSequences, 1545/1719 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 20 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 08:35:02,693 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