./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G valid-free) )\nCHECK( init(main()), LTL(G valid-deref) )\nCHECK( init(main()), LTL(G valid-memtrack) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:29:38,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:29:38,293 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:29:38,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:29:38,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:29:38,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:29:38,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:29:38,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:29:38,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:29:38,323 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:29:38,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:29:38,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:29:38,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:29:38,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:29:38,324 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:29:38,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:29:38,324 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:29:38,325 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:29:38,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:38,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:29:38,326 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2024-11-07 19:29:38,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:29:38,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:29:38,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:29:38,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:29:38,542 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:29:38,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-07 19:29:39,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:29:39,837 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:29:39,838 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-07 19:29:39,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c488c3bc6/b3b4e62649104f1f961467f28e876a51/FLAG5dfe853d6 [2024-11-07 19:29:40,226 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c488c3bc6/b3b4e62649104f1f961467f28e876a51 [2024-11-07 19:29:40,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:29:40,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:29:40,229 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:40,229 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:29:40,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:29:40,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63439a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40, skipping insertion in model container [2024-11-07 19:29:40,233 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,249 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:29:40,371 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-07 19:29:40,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:40,384 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:29:40,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:40,413 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:29:40,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40 WrapperNode [2024-11-07 19:29:40,414 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:40,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:40,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:29:40,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:29:40,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,454 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 306 [2024-11-07 19:29:40,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:40,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:29:40,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:29:40,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:29:40,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,491 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-07 19:29:40,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,507 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:29:40,517 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:29:40,517 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:29:40,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:29:40,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (1/1) ... [2024-11-07 19:29:40,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:40,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:40,549 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) [2024-11-07 19:29:40,554 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 [2024-11-07 19:29:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:29:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:29:40,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:29:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:29:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:29:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:29:40,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:29:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:29:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:29:40,573 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 19:29:40,678 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:29:40,679 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:29:41,030 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:29:41,030 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:29:41,323 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:29:41,323 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:29:41,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:41 BoogieIcfgContainer [2024-11-07 19:29:41,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:29:41,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:29:41,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:29:41,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:29:41,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:29:40" (1/3) ... [2024-11-07 19:29:41,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3060b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:41, skipping insertion in model container [2024-11-07 19:29:41,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:40" (2/3) ... [2024-11-07 19:29:41,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3060b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:41, skipping insertion in model container [2024-11-07 19:29:41,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:41" (3/3) ... [2024-11-07 19:29:41,331 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2024-11-07 19:29:41,341 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:29:41,341 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-07 19:29:41,341 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:29:41,404 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:29:41,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 50 transitions, 121 flow [2024-11-07 19:29:41,456 INFO L124 PetriNetUnfolderBase]: 7/47 cut-off events. [2024-11-07 19:29:41,458 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:29:41,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 7/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-07 19:29:41,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 50 transitions, 121 flow [2024-11-07 19:29:41,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 46 transitions, 110 flow [2024-11-07 19:29:41,468 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:29:41,479 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;@20dcf71f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:29:41,479 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-07 19:29:41,482 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:29:41,482 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:29:41,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:29:41,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:41,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:41,483 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:41,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 925738, now seen corresponding path program 1 times [2024-11-07 19:29:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432558496] [2024-11-07 19:29:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:41,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432558496] [2024-11-07 19:29:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432558496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:41,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:41,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:29:41,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875913271] [2024-11-07 19:29:41,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:41,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:29:41,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:29:41,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:29:41,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:41,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:42,108 INFO L124 PetriNetUnfolderBase]: 1316/2109 cut-off events. [2024-11-07 19:29:42,108 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-07 19:29:42,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 2109 events. 1316/2109 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10175 event pairs, 1060 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 3816. Up to 1877 conditions per place. [2024-11-07 19:29:42,131 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-07 19:29:42,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 162 flow [2024-11-07 19:29:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:29:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:29:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-07 19:29:42,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-07 19:29:42,144 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 73 transitions. [2024-11-07 19:29:42,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 162 flow [2024-11-07 19:29:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:29:42,152 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 90 flow [2024-11-07 19:29:42,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-07 19:29:42,158 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-11-07 19:29:42,158 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 90 flow [2024-11-07 19:29:42,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:42,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:42,158 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:42,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:29:42,159 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:42,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash 925739, now seen corresponding path program 1 times [2024-11-07 19:29:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188185461] [2024-11-07 19:29:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:42,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188185461] [2024-11-07 19:29:42,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188185461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:42,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:42,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:29:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840044883] [2024-11-07 19:29:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:42,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:42,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:42,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:42,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:42,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:42,583 INFO L124 PetriNetUnfolderBase]: 1316/2111 cut-off events. [2024-11-07 19:29:42,584 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:29:42,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 2111 events. 1316/2111 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10172 event pairs, 1060 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 4022. Up to 1881 conditions per place. [2024-11-07 19:29:42,593 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-11-07 19:29:42,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 164 flow [2024-11-07 19:29:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:29:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:29:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-07 19:29:42,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-07 19:29:42,595 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 90 flow. Second operand 3 states and 73 transitions. [2024-11-07 19:29:42,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 164 flow [2024-11-07 19:29:42,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:42,596 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 100 flow [2024-11-07 19:29:42,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-07 19:29:42,597 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2024-11-07 19:29:42,597 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 100 flow [2024-11-07 19:29:42,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:42,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:42,598 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:29:42,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:29:42,598 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:42,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash 889664305, now seen corresponding path program 1 times [2024-11-07 19:29:42,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:42,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938059583] [2024-11-07 19:29:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:42,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:42,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938059583] [2024-11-07 19:29:42,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938059583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:42,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363381828] [2024-11-07 19:29:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:42,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:42,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:42,801 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) [2024-11-07 19:29:42,802 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 [2024-11-07 19:29:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:42,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:29:42,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:42,902 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 [2024-11-07 19:29:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:42,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363381828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:43,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:43,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-07 19:29:43,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706322667] [2024-11-07 19:29:43,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:43,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:29:43,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:29:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:29:43,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:43,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:43,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:43,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:43,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:43,392 INFO L124 PetriNetUnfolderBase]: 1318/2117 cut-off events. [2024-11-07 19:29:43,392 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:29:43,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 2117 events. 1318/2117 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10194 event pairs, 1060 based on Foata normal form. 0/1747 useless extension candidates. Maximal degree in co-relation 4049. Up to 1883 conditions per place. [2024-11-07 19:29:43,400 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 35 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2024-11-07 19:29:43,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 204 flow [2024-11-07 19:29:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:29:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:29:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-07 19:29:43,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-07 19:29:43,402 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 100 flow. Second operand 5 states and 103 transitions. [2024-11-07 19:29:43,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 204 flow [2024-11-07 19:29:43,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:29:43,403 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2024-11-07 19:29:43,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-07 19:29:43,404 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2024-11-07 19:29:43,404 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2024-11-07 19:29:43,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:43,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:43,404 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2024-11-07 19:29:43,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:29:43,608 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 [2024-11-07 19:29:43,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:43,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash 747879613, now seen corresponding path program 2 times [2024-11-07 19:29:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:43,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691719172] [2024-11-07 19:29:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:43,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691719172] [2024-11-07 19:29:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691719172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822297473] [2024-11-07 19:29:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:29:43,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:43,727 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) [2024-11-07 19:29:43,729 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 [2024-11-07 19:29:43,806 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:29:43,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:29:43,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 19:29:43,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:43,868 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:29:43,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822297473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:43,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:29:43,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-07 19:29:43,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370266966] [2024-11-07 19:29:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:43,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:29:43,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:29:43,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:29:43,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-07 19:29:43,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:43,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:43,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-07 19:29:43,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:44,078 INFO L124 PetriNetUnfolderBase]: 1317/2114 cut-off events. [2024-11-07 19:29:44,078 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-07 19:29:44,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 2114 events. 1317/2114 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10181 event pairs, 1060 based on Foata normal form. 1/1746 useless extension candidates. Maximal degree in co-relation 4039. Up to 1879 conditions per place. [2024-11-07 19:29:44,088 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 31 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-11-07 19:29:44,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 206 flow [2024-11-07 19:29:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:29:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:29:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-07 19:29:44,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-07 19:29:44,091 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 140 flow. Second operand 6 states and 117 transitions. [2024-11-07 19:29:44,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 206 flow [2024-11-07 19:29:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 186 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:44,094 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 124 flow [2024-11-07 19:29:44,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-07 19:29:44,094 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-07 19:29:44,095 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 124 flow [2024-11-07 19:29:44,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:44,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:44,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:44,109 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 [2024-11-07 19:29:44,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:44,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:44,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 826344425, now seen corresponding path program 1 times [2024-11-07 19:29:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:44,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059469684] [2024-11-07 19:29:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:44,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059469684] [2024-11-07 19:29:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059469684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:44,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:44,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:29:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419622272] [2024-11-07 19:29:44,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:44,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:44,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:44,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:29:44,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:44,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:44,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:29:44,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:44,531 INFO L124 PetriNetUnfolderBase]: 1317/2000 cut-off events. [2024-11-07 19:29:44,531 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:29:44,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 2000 events. 1317/2000 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8571 event pairs, 1060 based on Foata normal form. 0/1745 useless extension candidates. Maximal degree in co-relation 3916. Up to 1878 conditions per place. [2024-11-07 19:29:44,540 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-07 19:29:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 190 flow [2024-11-07 19:29:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-07 19:29:44,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-07 19:29:44,541 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 124 flow. Second operand 4 states and 71 transitions. [2024-11-07 19:29:44,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 190 flow [2024-11-07 19:29:44,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 172 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-07 19:29:44,542 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 108 flow [2024-11-07 19:29:44,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-07 19:29:44,543 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2024-11-07 19:29:44,543 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 108 flow [2024-11-07 19:29:44,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:44,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:44,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:44,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:29:44,543 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:44,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 826344426, now seen corresponding path program 1 times [2024-11-07 19:29:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426025826] [2024-11-07 19:29:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426025826] [2024-11-07 19:29:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426025826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004812130] [2024-11-07 19:29:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:44,632 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) [2024-11-07 19:29:44,633 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 [2024-11-07 19:29:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:44,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:29:44,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:44,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004812130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-07 19:29:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653699136] [2024-11-07 19:29:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:44,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:29:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:29:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:29:44,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-07 19:29:44,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:44,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:44,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-07 19:29:44,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:44,930 INFO L124 PetriNetUnfolderBase]: 1315/1998 cut-off events. [2024-11-07 19:29:44,930 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:29:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1998 events. 1315/1998 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8567 event pairs, 1060 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 3908. Up to 1878 conditions per place. [2024-11-07 19:29:44,938 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-07 19:29:44,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 178 flow [2024-11-07 19:29:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:29:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:29:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-07 19:29:44,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-07 19:29:44,940 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 108 flow. Second operand 5 states and 103 transitions. [2024-11-07 19:29:44,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 178 flow [2024-11-07 19:29:44,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:44,941 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 103 flow [2024-11-07 19:29:44,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-11-07 19:29:44,941 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-11-07 19:29:44,942 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 103 flow [2024-11-07 19:29:44,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:44,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:44,942 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:44,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:45,142 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 [2024-11-07 19:29:45,143 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:45,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 353757046, now seen corresponding path program 2 times [2024-11-07 19:29:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:45,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622865968] [2024-11-07 19:29:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:29:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622865968] [2024-11-07 19:29:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622865968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207567122] [2024-11-07 19:29:45,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:29:45,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:45,354 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) [2024-11-07 19:29:45,355 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 [2024-11-07 19:29:45,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:29:45,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:29:45,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:29:45,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:45,430 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 [2024-11-07 19:29:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:29:45,481 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:29:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207567122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:29:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-07 19:29:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438551190] [2024-11-07 19:29:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:45,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:29:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:29:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:29:45,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:45,839 INFO L124 PetriNetUnfolderBase]: 2629/3831 cut-off events. [2024-11-07 19:29:45,841 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-07 19:29:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7690 conditions, 3831 events. 2629/3831 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17826 event pairs, 1240 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 7661. Up to 2168 conditions per place. [2024-11-07 19:29:45,853 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-07 19:29:45,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 282 flow [2024-11-07 19:29:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:29:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:29:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-07 19:29:45,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-07 19:29:45,854 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 103 flow. Second operand 5 states and 120 transitions. [2024-11-07 19:29:45,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 282 flow [2024-11-07 19:29:45,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:45,855 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 111 flow [2024-11-07 19:29:45,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-07 19:29:45,856 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-07 19:29:45,856 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 111 flow [2024-11-07 19:29:45,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:45,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:45,856 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:45,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:29:46,056 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 [2024-11-07 19:29:46,057 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:46,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 170638280, now seen corresponding path program 1 times [2024-11-07 19:29:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530139738] [2024-11-07 19:29:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:29:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530139738] [2024-11-07 19:29:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530139738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:46,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623757608] [2024-11-07 19:29:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:46,228 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) [2024-11-07 19:29:46,230 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 [2024-11-07 19:29:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:46,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:29:46,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:46,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:46,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:29:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623757608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:46,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:46,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2024-11-07 19:29:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904089213] [2024-11-07 19:29:46,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:46,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:29:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:29:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:29:46,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:46,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 111 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:46,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:46,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:46,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:47,616 INFO L124 PetriNetUnfolderBase]: 6825/9783 cut-off events. [2024-11-07 19:29:47,616 INFO L125 PetriNetUnfolderBase]: For 1384/1609 co-relation queries the response was YES. [2024-11-07 19:29:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20691 conditions, 9783 events. 6825/9783 cut-off events. For 1384/1609 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 49358 event pairs, 2385 based on Foata normal form. 0/8225 useless extension candidates. Maximal degree in co-relation 20659. Up to 4022 conditions per place. [2024-11-07 19:29:47,645 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 81 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2024-11-07 19:29:47,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 419 flow [2024-11-07 19:29:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:29:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:29:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-11-07 19:29:47,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-11-07 19:29:47,646 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 111 flow. Second operand 8 states and 183 transitions. [2024-11-07 19:29:47,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 419 flow [2024-11-07 19:29:47,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:29:47,648 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 133 flow [2024-11-07 19:29:47,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=133, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-07 19:29:47,648 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-07 19:29:47,648 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 133 flow [2024-11-07 19:29:47,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:47,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:47,649 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:47,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:29:47,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:47,851 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:47,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1072652486, now seen corresponding path program 1 times [2024-11-07 19:29:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:47,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034627081] [2024-11-07 19:29:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:48,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034627081] [2024-11-07 19:29:48,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034627081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575966991] [2024-11-07 19:29:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:48,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:48,077 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) [2024-11-07 19:29:48,079 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 [2024-11-07 19:29:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:48,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:29:48,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:48,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:48,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:29:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575966991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:48,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-07 19:29:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353776666] [2024-11-07 19:29:48,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:48,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:29:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:29:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:29:48,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:48,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 133 flow. Second operand has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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) [2024-11-07 19:29:48,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:48,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:48,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:50,245 INFO L124 PetriNetUnfolderBase]: 12853/18397 cut-off events. [2024-11-07 19:29:50,246 INFO L125 PetriNetUnfolderBase]: For 2839/2839 co-relation queries the response was YES. [2024-11-07 19:29:50,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 18397 events. 12853/18397 cut-off events. For 2839/2839 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 101199 event pairs, 3460 based on Foata normal form. 0/15491 useless extension candidates. Maximal degree in co-relation 40473. Up to 5736 conditions per place. [2024-11-07 19:29:50,319 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2024-11-07 19:29:50,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 608 flow [2024-11-07 19:29:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:29:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:29:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-07 19:29:50,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-07 19:29:50,320 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 133 flow. Second operand 9 states and 225 transitions. [2024-11-07 19:29:50,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 608 flow [2024-11-07 19:29:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:50,327 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 160 flow [2024-11-07 19:29:50,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2024-11-07 19:29:50,327 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-11-07 19:29:50,328 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 160 flow [2024-11-07 19:29:50,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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) [2024-11-07 19:29:50,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:50,329 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:50,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:50,529 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,SelfDestructingSolverStorable8 [2024-11-07 19:29:50,530 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:50,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -383312668, now seen corresponding path program 1 times [2024-11-07 19:29:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:50,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621112602] [2024-11-07 19:29:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621112602] [2024-11-07 19:29:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621112602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431331872] [2024-11-07 19:29:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:50,736 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) [2024-11-07 19:29:50,737 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 [2024-11-07 19:29:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:50,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:29:50,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:50,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:50,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:29:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431331872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:51,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-07 19:29:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926680983] [2024-11-07 19:29:51,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:51,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:29:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:29:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:29:51,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:51,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 160 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:51,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:51,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:51,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:53,982 INFO L124 PetriNetUnfolderBase]: 32327/46067 cut-off events. [2024-11-07 19:29:53,982 INFO L125 PetriNetUnfolderBase]: For 20501/20917 co-relation queries the response was YES. [2024-11-07 19:29:54,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104651 conditions, 46067 events. 32327/46067 cut-off events. For 20501/20917 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 277248 event pairs, 12757 based on Foata normal form. 0/38291 useless extension candidates. Maximal degree in co-relation 104612. Up to 20102 conditions per place. [2024-11-07 19:29:54,350 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2024-11-07 19:29:54,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 546 flow [2024-11-07 19:29:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:29:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:29:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-11-07 19:29:54,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-11-07 19:29:54,352 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 160 flow. Second operand 8 states and 179 transitions. [2024-11-07 19:29:54,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 546 flow [2024-11-07 19:29:54,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 521 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:29:54,359 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2024-11-07 19:29:54,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-11-07 19:29:54,361 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2024-11-07 19:29:54,361 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2024-11-07 19:29:54,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:54,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:54,361 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:54,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:29:54,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:54,566 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:29:54,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1973150936, now seen corresponding path program 1 times [2024-11-07 19:29:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:54,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128219123] [2024-11-07 19:29:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:54,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128219123] [2024-11-07 19:29:54,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128219123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695611975] [2024-11-07 19:29:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:54,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:54,763 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) [2024-11-07 19:29:54,764 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 [2024-11-07 19:29:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:54,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:29:54,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:54,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:55,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:29:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695611975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:55,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:55,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-07 19:29:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751361852] [2024-11-07 19:29:55,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:55,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:29:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:29:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:29:55,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:29:55,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:55,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:55,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:29:55,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:59,615 INFO L124 PetriNetUnfolderBase]: 41923/59631 cut-off events. [2024-11-07 19:29:59,615 INFO L125 PetriNetUnfolderBase]: For 25134/25806 co-relation queries the response was YES. [2024-11-07 19:29:59,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 59631 events. 41923/59631 cut-off events. For 25134/25806 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 369900 event pairs, 12007 based on Foata normal form. 778/51213 useless extension candidates. Maximal degree in co-relation 139794. Up to 18928 conditions per place. [2024-11-07 19:29:59,925 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 121 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-07 19:29:59,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 715 flow [2024-11-07 19:29:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:29:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:29:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-11-07 19:29:59,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-11-07 19:29:59,927 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 9 states and 218 transitions. [2024-11-07 19:29:59,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 715 flow [2024-11-07 19:30:00,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:00,030 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 194 flow [2024-11-07 19:30:00,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2024-11-07 19:30:00,031 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2024-11-07 19:30:00,031 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 194 flow [2024-11-07 19:30:00,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:00,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:00,031 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-07 19:30:00,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-07 19:30:00,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:00,232 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:30:00,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash -361073222, now seen corresponding path program 2 times [2024-11-07 19:30:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483186249] [2024-11-07 19:30:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:00,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:30:00,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:00,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483186249] [2024-11-07 19:30:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483186249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:00,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52372040] [2024-11-07 19:30:00,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:00,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:00,294 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) [2024-11-07 19:30:00,295 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 [2024-11-07 19:30:00,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:00,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:00,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:30:00,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:30:00,392 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52372040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:00,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-11-07 19:30:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553063319] [2024-11-07 19:30:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:00,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:30:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:30:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:30:00,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-07 19:30:00,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:00,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:00,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-07 19:30:00,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:04,269 INFO L124 PetriNetUnfolderBase]: 37549/53687 cut-off events. [2024-11-07 19:30:04,269 INFO L125 PetriNetUnfolderBase]: For 28827/29503 co-relation queries the response was YES. [2024-11-07 19:30:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128219 conditions, 53687 events. 37549/53687 cut-off events. For 28827/29503 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 341404 event pairs, 975 based on Foata normal form. 0/45743 useless extension candidates. Maximal degree in co-relation 128175. Up to 13570 conditions per place. [2024-11-07 19:30:04,558 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 148 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2024-11-07 19:30:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 155 transitions, 875 flow [2024-11-07 19:30:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-11-07 19:30:04,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-07 19:30:04,559 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 194 flow. Second operand 6 states and 204 transitions. [2024-11-07 19:30:04,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 155 transitions, 875 flow [2024-11-07 19:30:04,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 155 transitions, 818 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-11-07 19:30:04,751 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 166 flow [2024-11-07 19:30:04,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2024-11-07 19:30:04,751 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-11-07 19:30:04,751 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 166 flow [2024-11-07 19:30:04,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:04,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:04,751 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:04,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 19:30:04,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:04,952 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:30:04,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash 379576996, now seen corresponding path program 1 times [2024-11-07 19:30:04,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644262191] [2024-11-07 19:30:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644262191] [2024-11-07 19:30:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644262191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952339333] [2024-11-07 19:30:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:05,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 19:30:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:05,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:30:05,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:05,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:05,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:30:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:05,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952339333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:05,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:05,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-07 19:30:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217356997] [2024-11-07 19:30:05,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:05,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:30:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:30:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:30:05,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-07 19:30:05,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 166 flow. Second operand has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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) [2024-11-07 19:30:05,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:05,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-07 19:30:05,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:10,499 INFO L124 PetriNetUnfolderBase]: 51001/72889 cut-off events. [2024-11-07 19:30:10,500 INFO L125 PetriNetUnfolderBase]: For 35627/36419 co-relation queries the response was YES. [2024-11-07 19:30:10,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173644 conditions, 72889 events. 51001/72889 cut-off events. For 35627/36419 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 460382 event pairs, 16083 based on Foata normal form. 940/66037 useless extension candidates. Maximal degree in co-relation 173607. Up to 24864 conditions per place. [2024-11-07 19:30:10,892 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-11-07 19:30:10,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 694 flow [2024-11-07 19:30:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-11-07 19:30:10,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-11-07 19:30:10,893 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 166 flow. Second operand 9 states and 212 transitions. [2024-11-07 19:30:10,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 694 flow [2024-11-07 19:30:11,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:11,042 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 185 flow [2024-11-07 19:30:11,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2024-11-07 19:30:11,043 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-11-07 19:30:11,043 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 185 flow [2024-11-07 19:30:11,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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) [2024-11-07 19:30:11,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:11,043 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:11,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 19:30:11,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-07 19:30:11,244 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:30:11,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1216177871, now seen corresponding path program 2 times [2024-11-07 19:30:11,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:11,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117994094] [2024-11-07 19:30:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:11,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:30:11,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:11,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117994094] [2024-11-07 19:30:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117994094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:11,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829643184] [2024-11-07 19:30:11,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:11,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:11,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:11,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:11,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-07 19:30:11,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:11,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:11,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:30:11,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:30:11,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829643184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:11,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:11,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-11-07 19:30:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237248560] [2024-11-07 19:30:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:11,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:30:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:30:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:30:11,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-07 19:30:11,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2024-11-07 19:30:11,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:11,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-07 19:30:11,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand