./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.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/popl20-more-sum-array-hom.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', '37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a'] 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/popl20-more-sum-array-hom.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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:36:40,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:36:40,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:36:40,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:36:40,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:36:40,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:36:40,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:36:40,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:36:40,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:36:40,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:36:40,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:36:40,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:36:40,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:36:40,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:36:40,855 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:36:40,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:36:40,855 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:36:40,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:36:40,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:36:40,856 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:36:40,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:36:40,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:36:40,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:36:40,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:36:40,859 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 -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-07 19:36:41,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:36:41,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:36:41,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:36:41,174 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:36:41,175 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:36:41,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-07 19:36:42,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:36:42,740 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:36:42,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-07 19:36:42,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/10d20af88/b8e1415cd19f486a90d332c8a4eaa06e/FLAGb66a8332f [2024-11-07 19:36:42,776 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/10d20af88/b8e1415cd19f486a90d332c8a4eaa06e [2024-11-07 19:36:42,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:36:42,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:36:42,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:36:42,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:36:42,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:36:42,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:42" (1/1) ... [2024-11-07 19:36:42,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c42868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:42, skipping insertion in model container [2024-11-07 19:36:42,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:42" (1/1) ... [2024-11-07 19:36:42,809 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:36:42,976 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 19:36:42,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:36:42,994 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:36:43,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:36:43,037 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:36:43,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43 WrapperNode [2024-11-07 19:36:43,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:36:43,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:36:43,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:36:43,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:36:43,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,074 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-07 19:36:43,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:36:43,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:36:43,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:36:43,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:36:43,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,106 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 19:36:43,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:36:43,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:36:43,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:36:43,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:36:43,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (1/1) ... [2024-11-07 19:36:43,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:36:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:43,163 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 19:36:43,165 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 19:36:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:36:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:36:43,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:36:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:36:43,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:36:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:36:43,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:36:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:36:43,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:36:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:36:43,186 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 19:36:43,277 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:36:43,279 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:36:43,591 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:36:43,593 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:36:43,831 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:36:43,831 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:36:43,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:43 BoogieIcfgContainer [2024-11-07 19:36:43,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:36:43,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:36:43,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:36:43,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:36:43,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:36:42" (1/3) ... [2024-11-07 19:36:43,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34abc430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:43, skipping insertion in model container [2024-11-07 19:36:43,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:43" (2/3) ... [2024-11-07 19:36:43,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34abc430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:43, skipping insertion in model container [2024-11-07 19:36:43,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:43" (3/3) ... [2024-11-07 19:36:43,842 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-07 19:36:43,854 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:36:43,854 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-07 19:36:43,854 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:36:43,917 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:36:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 41 transitions, 103 flow [2024-11-07 19:36:43,985 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-07 19:36:43,987 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:36:43,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 4/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-07 19:36:43,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 41 transitions, 103 flow [2024-11-07 19:36:43,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 92 flow [2024-11-07 19:36:44,003 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:36:44,017 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;@33569756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:36:44,017 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-07 19:36:44,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:36:44,025 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:36:44,026 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:36:44,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:44,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:36:44,027 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 19:36:44,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash 410499, now seen corresponding path program 1 times [2024-11-07 19:36:44,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:44,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557240195] [2024-11-07 19:36:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:44,266 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 19:36:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557240195] [2024-11-07 19:36:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557240195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:44,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:36:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388700569] [2024-11-07 19:36:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:44,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:44,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:44,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 19:36:44,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:44,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:44,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:44,510 INFO L124 PetriNetUnfolderBase]: 200/348 cut-off events. [2024-11-07 19:36:44,511 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-07 19:36:44,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 348 events. 200/348 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1191 event pairs, 124 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 585. Up to 293 conditions per place. [2024-11-07 19:36:44,519 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-07 19:36:44,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 132 flow [2024-11-07 19:36:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-07 19:36:44,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-11-07 19:36:44,536 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 92 flow. Second operand 3 states and 70 transitions. [2024-11-07 19:36:44,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 132 flow [2024-11-07 19:36:44,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:44,546 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 78 flow [2024-11-07 19:36:44,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-07 19:36:44,552 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2024-11-07 19:36:44,553 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 78 flow [2024-11-07 19:36:44,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 19:36:44,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:44,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:36:44,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:36:44,553 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 19:36:44,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash 410500, now seen corresponding path program 1 times [2024-11-07 19:36:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:44,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59707561] [2024-11-07 19:36:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:44,958 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 19:36:44,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:44,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59707561] [2024-11-07 19:36:44,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59707561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:44,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:44,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:44,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318404953] [2024-11-07 19:36:44,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:44,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:44,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:44,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:44,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 19:36:44,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:44,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:44,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:45,193 INFO L124 PetriNetUnfolderBase]: 201/351 cut-off events. [2024-11-07 19:36:45,193 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:36:45,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 351 events. 201/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1200 event pairs, 124 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 647. Up to 298 conditions per place. [2024-11-07 19:36:45,198 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 23 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-07 19:36:45,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 140 flow [2024-11-07 19:36:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-07 19:36:45,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-07 19:36:45,202 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 78 flow. Second operand 4 states and 88 transitions. [2024-11-07 19:36:45,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 140 flow [2024-11-07 19:36:45,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:45,204 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-07 19:36:45,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-07 19:36:45,206 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-11-07 19:36:45,206 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-07 19:36:45,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 19:36:45,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:45,207 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:36:45,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:36:45,207 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 19:36:45,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 394503146, now seen corresponding path program 1 times [2024-11-07 19:36:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:45,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223712626] [2024-11-07 19:36:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:45,543 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 19:36:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223712626] [2024-11-07 19:36:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223712626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524873678] [2024-11-07 19:36:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:45,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:45,547 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 19:36:45,549 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 19:36:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:45,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:36:45,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:45,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:36:45,967 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 19:36:45,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:46,091 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 19:36:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524873678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:46,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:46,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:36:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469449216] [2024-11-07 19:36:46,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:46,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:36:46,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:36:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:46,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:46,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 19:36:46,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:46,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:46,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:46,463 INFO L124 PetriNetUnfolderBase]: 202/353 cut-off events. [2024-11-07 19:36:46,464 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:36:46,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 353 events. 202/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1213 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 654. Up to 295 conditions per place. [2024-11-07 19:36:46,468 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 19 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2024-11-07 19:36:46,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 167 flow [2024-11-07 19:36:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-11-07 19:36:46,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-11-07 19:36:46,474 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 8 states and 151 transitions. [2024-11-07 19:36:46,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 167 flow [2024-11-07 19:36:46,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:36:46,476 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 126 flow [2024-11-07 19:36:46,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-11-07 19:36:46,478 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-07 19:36:46,478 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 126 flow [2024-11-07 19:36:46,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 19:36:46,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:46,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:36:46,499 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 19:36:46,679 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 19:36:46,680 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:46,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -653285282, now seen corresponding path program 1 times [2024-11-07 19:36:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:46,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706561400] [2024-11-07 19:36:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:46,778 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 19:36:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706561400] [2024-11-07 19:36:46,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706561400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:46,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:46,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814379336] [2024-11-07 19:36:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:46,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:46,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-11-07 19:36:46,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:36:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-11-07 19:36:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:46,895 INFO L124 PetriNetUnfolderBase]: 202/336 cut-off events. [2024-11-07 19:36:46,896 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:36:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 336 events. 202/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1042 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 638. Up to 294 conditions per place. [2024-11-07 19:36:46,899 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 25 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-07 19:36:46,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 178 flow [2024-11-07 19:36:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-07 19:36:46,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-11-07 19:36:46,901 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 126 flow. Second operand 4 states and 74 transitions. [2024-11-07 19:36:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 178 flow [2024-11-07 19:36:46,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 136 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-07 19:36:46,903 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 86 flow [2024-11-07 19:36:46,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-07 19:36:46,904 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2024-11-07 19:36:46,904 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 86 flow [2024-11-07 19:36:46,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:36:46,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:46,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:36:46,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:36:46,905 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:46,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -653285281, now seen corresponding path program 1 times [2024-11-07 19:36:46,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:46,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83729190] [2024-11-07 19:36:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:46,980 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 19:36:46,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:46,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83729190] [2024-11-07 19:36:46,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83729190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:46,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:46,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:36:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751671916] [2024-11-07 19:36:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:46,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:36:46,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:46,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 19:36:46,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:46,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:46,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:47,159 INFO L124 PetriNetUnfolderBase]: 433/716 cut-off events. [2024-11-07 19:36:47,159 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:47,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 716 events. 433/716 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2755 event pairs, 248 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 813. Up to 384 conditions per place. [2024-11-07 19:36:47,164 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-07 19:36:47,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 270 flow [2024-11-07 19:36:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-07 19:36:47,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-11-07 19:36:47,166 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 86 flow. Second operand 5 states and 132 transitions. [2024-11-07 19:36:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 270 flow [2024-11-07 19:36:47,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:47,168 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2024-11-07 19:36:47,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-07 19:36:47,169 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-07 19:36:47,169 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2024-11-07 19:36:47,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 19:36:47,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:47,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:47,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:36:47,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:47,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash -751478171, now seen corresponding path program 1 times [2024-11-07 19:36:47,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:47,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91635677] [2024-11-07 19:36:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:47,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:47,275 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 19:36:47,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91635677] [2024-11-07 19:36:47,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91635677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:47,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:47,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:36:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468454725] [2024-11-07 19:36:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:47,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:36:47,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:47,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 19:36:47,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:47,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:47,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:47,462 INFO L124 PetriNetUnfolderBase]: 410/680 cut-off events. [2024-11-07 19:36:47,462 INFO L125 PetriNetUnfolderBase]: For 222/253 co-relation queries the response was YES. [2024-11-07 19:36:47,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 680 events. 410/680 cut-off events. For 222/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2583 event pairs, 248 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 900. Up to 389 conditions per place. [2024-11-07 19:36:47,468 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-07 19:36:47,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-11-07 19:36:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-07 19:36:47,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-11-07 19:36:47,470 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 106 flow. Second operand 5 states and 129 transitions. [2024-11-07 19:36:47,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-11-07 19:36:47,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:47,473 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 126 flow [2024-11-07 19:36:47,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-07 19:36:47,473 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-07 19:36:47,474 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 126 flow [2024-11-07 19:36:47,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 19:36:47,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:47,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:47,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:36:47,474 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:47,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1615111737, now seen corresponding path program 1 times [2024-11-07 19:36:47,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196506621] [2024-11-07 19:36:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:47,672 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 19:36:47,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:47,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196506621] [2024-11-07 19:36:47,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196506621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:47,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825268771] [2024-11-07 19:36:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:47,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:47,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:47,676 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 19:36:47,678 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 19:36:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:47,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:36:47,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:47,847 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 19:36:47,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:47,902 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 19:36:47,916 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 19:36:47,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825268771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:47,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:47,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-07 19:36:47,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092678433] [2024-11-07 19:36:47,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:47,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:36:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:36:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:48,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:48,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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 19:36:48,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:48,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:48,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:48,423 INFO L124 PetriNetUnfolderBase]: 491/823 cut-off events. [2024-11-07 19:36:48,423 INFO L125 PetriNetUnfolderBase]: For 418/470 co-relation queries the response was YES. [2024-11-07 19:36:48,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 823 events. 491/823 cut-off events. For 418/470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3411 event pairs, 293 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1278. Up to 404 conditions per place. [2024-11-07 19:36:48,431 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-07 19:36:48,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 312 flow [2024-11-07 19:36:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-11-07 19:36:48,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-07 19:36:48,432 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 126 flow. Second operand 6 states and 148 transitions. [2024-11-07 19:36:48,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 312 flow [2024-11-07 19:36:48,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:48,435 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 152 flow [2024-11-07 19:36:48,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-07 19:36:48,436 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-07 19:36:48,436 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 152 flow [2024-11-07 19:36:48,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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 19:36:48,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:48,437 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:48,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:36:48,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:48,641 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:48,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:48,642 INFO L85 PathProgramCache]: Analyzing trace with hash -621989837, now seen corresponding path program 1 times [2024-11-07 19:36:48,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:48,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066606589] [2024-11-07 19:36:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:48,736 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 19:36:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066606589] [2024-11-07 19:36:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066606589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:36:48,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556106175] [2024-11-07 19:36:48,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:48,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:36:48,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:48,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 19:36:48,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:48,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:48,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:48,923 INFO L124 PetriNetUnfolderBase]: 483/777 cut-off events. [2024-11-07 19:36:48,923 INFO L125 PetriNetUnfolderBase]: For 923/1094 co-relation queries the response was YES. [2024-11-07 19:36:48,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 777 events. 483/777 cut-off events. For 923/1094 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2974 event pairs, 306 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1492. Up to 511 conditions per place. [2024-11-07 19:36:48,930 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-07 19:36:48,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 324 flow [2024-11-07 19:36:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-07 19:36:48,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-11-07 19:36:48,932 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 152 flow. Second operand 5 states and 126 transitions. [2024-11-07 19:36:48,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 324 flow [2024-11-07 19:36:48,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:48,937 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 164 flow [2024-11-07 19:36:48,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-07 19:36:48,939 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-11-07 19:36:48,940 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 164 flow [2024-11-07 19:36:48,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 19:36:48,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:48,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:48,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:36:48,941 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:48,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1629637055, now seen corresponding path program 1 times [2024-11-07 19:36:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:48,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471821685] [2024-11-07 19:36:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:49,114 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 19:36:49,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471821685] [2024-11-07 19:36:49,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471821685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:49,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519275026] [2024-11-07 19:36:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:49,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:49,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:49,119 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 19:36:49,120 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 19:36:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:49,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:36:49,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:49,281 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 19:36:49,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:49,344 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 19:36:49,360 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 19:36:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519275026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:49,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:49,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-07 19:36:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013471221] [2024-11-07 19:36:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:49,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:36:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:36:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:49,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:49,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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 19:36:49,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:49,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:49,783 INFO L124 PetriNetUnfolderBase]: 625/1028 cut-off events. [2024-11-07 19:36:49,783 INFO L125 PetriNetUnfolderBase]: For 1053/1271 co-relation queries the response was YES. [2024-11-07 19:36:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1028 events. 625/1028 cut-off events. For 1053/1271 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4488 event pairs, 358 based on Foata normal form. 0/985 useless extension candidates. Maximal degree in co-relation 2185. Up to 564 conditions per place. [2024-11-07 19:36:49,792 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-07 19:36:49,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 367 flow [2024-11-07 19:36:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-11-07 19:36:49,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-11-07 19:36:49,794 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 164 flow. Second operand 6 states and 146 transitions. [2024-11-07 19:36:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 367 flow [2024-11-07 19:36:49,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:49,801 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 190 flow [2024-11-07 19:36:49,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-07 19:36:49,802 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-07 19:36:49,803 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 190 flow [2024-11-07 19:36:49,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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 19:36:49,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:49,804 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:49,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:36:50,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:50,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:50,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:50,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1639198813, now seen corresponding path program 1 times [2024-11-07 19:36:50,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:50,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110728974] [2024-11-07 19:36:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:50,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110728974] [2024-11-07 19:36:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110728974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146455572] [2024-11-07 19:36:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:50,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:50,109 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 19:36:50,111 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 19:36:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:50,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:50,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:50,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146455572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:50,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:36:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584822454] [2024-11-07 19:36:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:50,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:50,377 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:50,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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 19:36:50,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:50,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:50,784 INFO L124 PetriNetUnfolderBase]: 1167/1863 cut-off events. [2024-11-07 19:36:50,784 INFO L125 PetriNetUnfolderBase]: For 2238/2543 co-relation queries the response was YES. [2024-11-07 19:36:50,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1863 events. 1167/1863 cut-off events. For 2238/2543 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8857 event pairs, 547 based on Foata normal form. 34/1893 useless extension candidates. Maximal degree in co-relation 3771. Up to 806 conditions per place. [2024-11-07 19:36:50,804 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-11-07 19:36:50,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 594 flow [2024-11-07 19:36:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-07 19:36:50,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-11-07 19:36:50,807 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 190 flow. Second operand 8 states and 194 transitions. [2024-11-07 19:36:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 594 flow [2024-11-07 19:36:50,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 573 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:50,816 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 250 flow [2024-11-07 19:36:50,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-07 19:36:50,817 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-07 19:36:50,817 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 250 flow [2024-11-07 19:36:50,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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 19:36:50,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:50,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:50,839 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 19:36:51,018 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,SelfDestructingSolverStorable9 [2024-11-07 19:36:51,018 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:51,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1587826419, now seen corresponding path program 1 times [2024-11-07 19:36:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540948105] [2024-11-07 19:36:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:51,225 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 19:36:51,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:51,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540948105] [2024-11-07 19:36:51,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540948105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:51,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418638636] [2024-11-07 19:36:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:51,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:51,228 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 19:36:51,230 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 19:36:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:51,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:36:51,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:51,489 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 19:36:51,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:36:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418638636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:36:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-07 19:36:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074900437] [2024-11-07 19:36:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:51,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:36:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:36:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-07 19:36:51,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:36:51,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 19:36:51,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:51,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:36:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:51,863 INFO L124 PetriNetUnfolderBase]: 1113/1703 cut-off events. [2024-11-07 19:36:51,863 INFO L125 PetriNetUnfolderBase]: For 4398/4878 co-relation queries the response was YES. [2024-11-07 19:36:51,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1703 events. 1113/1703 cut-off events. For 4398/4878 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7601 event pairs, 409 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 4222. Up to 896 conditions per place. [2024-11-07 19:36:51,876 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-07 19:36:51,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 658 flow [2024-11-07 19:36:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-07 19:36:51,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-11-07 19:36:51,878 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 250 flow. Second operand 6 states and 127 transitions. [2024-11-07 19:36:51,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 658 flow [2024-11-07 19:36:51,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 634 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:51,884 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 252 flow [2024-11-07 19:36:51,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-07 19:36:51,885 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-07 19:36:51,885 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 252 flow [2024-11-07 19:36:51,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 19:36:51,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:51,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:51,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:52,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-07 19:36:52,091 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:52,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1581839581, now seen corresponding path program 1 times [2024-11-07 19:36:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105259976] [2024-11-07 19:36:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:52,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105259976] [2024-11-07 19:36:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105259976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:52,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486110114] [2024-11-07 19:36:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:52,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:52,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:52,189 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 19:36:52,191 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 19:36:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:52,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:36:52,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:52,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486110114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:52,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-07 19:36:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920348127] [2024-11-07 19:36:52,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:52,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:36:52,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:36:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:36:52,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:52,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 252 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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 19:36:52,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:52,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:52,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:52,896 INFO L124 PetriNetUnfolderBase]: 1136/1733 cut-off events. [2024-11-07 19:36:52,896 INFO L125 PetriNetUnfolderBase]: For 4695/5195 co-relation queries the response was YES. [2024-11-07 19:36:52,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1733 events. 1136/1733 cut-off events. For 4695/5195 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7482 event pairs, 544 based on Foata normal form. 35/1765 useless extension candidates. Maximal degree in co-relation 4569. Up to 816 conditions per place. [2024-11-07 19:36:52,911 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 75 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-11-07 19:36:52,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 653 flow [2024-11-07 19:36:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-07 19:36:52,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-11-07 19:36:52,913 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 252 flow. Second operand 8 states and 192 transitions. [2024-11-07 19:36:52,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 653 flow [2024-11-07 19:36:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:36:52,919 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 305 flow [2024-11-07 19:36:52,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-11-07 19:36:52,920 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-07 19:36:52,920 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 305 flow [2024-11-07 19:36:52,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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 19:36:52,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:52,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:52,937 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 19:36:53,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-07 19:36:53,125 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:53,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 673362231, now seen corresponding path program 2 times [2024-11-07 19:36:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:53,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869441650] [2024-11-07 19:36:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:53,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:53,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869441650] [2024-11-07 19:36:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869441650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:53,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127035459] [2024-11-07 19:36:53,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:53,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:53,361 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 19:36:53,363 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 19:36:53,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:53,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:53,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-07 19:36:53,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:53,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:36:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:53,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127035459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:53,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-07 19:36:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420622117] [2024-11-07 19:36:53,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:53,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:36:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:36:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:36:54,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:36:54,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 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 19:36:54,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:54,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:36:54,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:55,690 INFO L124 PetriNetUnfolderBase]: 1326/2004 cut-off events. [2024-11-07 19:36:55,691 INFO L125 PetriNetUnfolderBase]: For 5054/5460 co-relation queries the response was YES. [2024-11-07 19:36:55,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 2004 events. 1326/2004 cut-off events. For 5054/5460 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8849 event pairs, 285 based on Foata normal form. 0/2000 useless extension candidates. Maximal degree in co-relation 5231. Up to 428 conditions per place. [2024-11-07 19:36:55,706 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-11-07 19:36:55,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 165 transitions, 1137 flow [2024-11-07 19:36:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:36:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:36:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 334 transitions. [2024-11-07 19:36:55,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-11-07 19:36:55,708 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 305 flow. Second operand 14 states and 334 transitions. [2024-11-07 19:36:55,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 165 transitions, 1137 flow [2024-11-07 19:36:55,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 165 transitions, 1109 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:55,719 INFO L231 Difference]: Finished difference. Result has 76 places, 55 transitions, 357 flow [2024-11-07 19:36:55,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=357, PETRI_PLACES=76, PETRI_TRANSITIONS=55} [2024-11-07 19:36:55,720 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-11-07 19:36:55,721 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 55 transitions, 357 flow [2024-11-07 19:36:55,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 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 19:36:55,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:55,722 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:55,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:55,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:55,923 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:55,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2037858947, now seen corresponding path program 2 times [2024-11-07 19:36:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:55,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935568370] [2024-11-07 19:36:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:55,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:56,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:56,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935568370] [2024-11-07 19:36:56,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935568370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:56,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192469367] [2024-11-07 19:36:56,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:56,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:56,145 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 19:36:56,147 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 19:36:56,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:56,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:56,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:36:56,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:56,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:56,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:36:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192469367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:56,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-07 19:36:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821515727] [2024-11-07 19:36:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:56,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:36:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:36:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:36:56,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:36:56,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 55 transitions, 357 flow. Second operand has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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 19:36:56,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:56,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:36:56,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:57,813 INFO L124 PetriNetUnfolderBase]: 1770/2590 cut-off events. [2024-11-07 19:36:57,814 INFO L125 PetriNetUnfolderBase]: For 10016/10527 co-relation queries the response was YES. [2024-11-07 19:36:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10595 conditions, 2590 events. 1770/2590 cut-off events. For 10016/10527 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11166 event pairs, 349 based on Foata normal form. 0/2585 useless extension candidates. Maximal degree in co-relation 7074. Up to 476 conditions per place. [2024-11-07 19:36:57,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 24 changer transitions 0/163 dead transitions. [2024-11-07 19:36:57,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 163 transitions, 1291 flow [2024-11-07 19:36:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:36:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:36:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 327 transitions. [2024-11-07 19:36:57,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5696864111498258 [2024-11-07 19:36:57,847 INFO L175 Difference]: Start difference. First operand has 76 places, 55 transitions, 357 flow. Second operand 14 states and 327 transitions. [2024-11-07 19:36:57,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 163 transitions, 1291 flow [2024-11-07 19:36:57,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 163 transitions, 1093 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-11-07 19:36:57,860 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 401 flow [2024-11-07 19:36:57,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=401, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-11-07 19:36:57,861 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-07 19:36:57,861 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 401 flow [2024-11-07 19:36:57,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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 19:36:57,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:57,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:57,881 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 19:36:58,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:58,068 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:58,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -194226030, now seen corresponding path program 1 times [2024-11-07 19:36:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:58,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037272293] [2024-11-07 19:36:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:58,266 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 19:36:58,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037272293] [2024-11-07 19:36:58,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037272293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:58,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:58,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:58,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604491092] [2024-11-07 19:36:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:58,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:58,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-07 19:36:58,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:58,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-07 19:36:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:58,508 INFO L124 PetriNetUnfolderBase]: 1761/2791 cut-off events. [2024-11-07 19:36:58,509 INFO L125 PetriNetUnfolderBase]: For 9739/10124 co-relation queries the response was YES. [2024-11-07 19:36:58,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11576 conditions, 2791 events. 1761/2791 cut-off events. For 9739/10124 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13477 event pairs, 439 based on Foata normal form. 18/2777 useless extension candidates. Maximal degree in co-relation 8341. Up to 1811 conditions per place. [2024-11-07 19:36:58,521 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 62 selfloop transitions, 8 changer transitions 8/86 dead transitions. [2024-11-07 19:36:58,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 716 flow [2024-11-07 19:36:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-07 19:36:58,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2024-11-07 19:36:58,522 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 401 flow. Second operand 3 states and 89 transitions. [2024-11-07 19:36:58,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 716 flow [2024-11-07 19:36:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 623 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-11-07 19:36:58,530 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 365 flow [2024-11-07 19:36:58,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-07 19:36:58,531 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-07 19:36:58,531 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 365 flow [2024-11-07 19:36:58,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:58,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:58,531 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:58,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:36:58,531 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:58,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1458239330, now seen corresponding path program 1 times [2024-11-07 19:36:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201893792] [2024-11-07 19:36:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:36:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201893792] [2024-11-07 19:36:58,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201893792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:58,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400430384] [2024-11-07 19:36:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:58,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:58,624 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 19:36:58,626 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 19:36:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:58,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:36:58,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:36:58,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:36:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400430384] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:36:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-07 19:36:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920886059] [2024-11-07 19:36:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:58,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:58,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:58,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:36:58,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 19:36:58,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:58,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:36:58,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:59,019 INFO L124 PetriNetUnfolderBase]: 1851/2787 cut-off events. [2024-11-07 19:36:59,020 INFO L125 PetriNetUnfolderBase]: For 7555/7949 co-relation queries the response was YES. [2024-11-07 19:36:59,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 2787 events. 1851/2787 cut-off events. For 7555/7949 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13321 event pairs, 713 based on Foata normal form. 151/2836 useless extension candidates. Maximal degree in co-relation 6895. Up to 1574 conditions per place. [2024-11-07 19:36:59,031 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 67 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-07 19:36:59,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 668 flow [2024-11-07 19:36:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-07 19:36:59,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-11-07 19:36:59,033 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 365 flow. Second operand 5 states and 113 transitions. [2024-11-07 19:36:59,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 668 flow [2024-11-07 19:36:59,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 560 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-11-07 19:36:59,047 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 324 flow [2024-11-07 19:36:59,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-07 19:36:59,048 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-11-07 19:36:59,048 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 324 flow [2024-11-07 19:36:59,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 19:36:59,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:59,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:59,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:59,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:59,249 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:36:59,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash -934982250, now seen corresponding path program 1 times [2024-11-07 19:36:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610872538] [2024-11-07 19:36:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:59,344 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 19:36:59,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:59,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610872538] [2024-11-07 19:36:59,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610872538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:59,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707813654] [2024-11-07 19:36:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:59,347 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 19:36:59,349 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 19:36:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:59,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:59,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:59,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:59,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707813654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:59,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:59,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-07 19:36:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442452937] [2024-11-07 19:36:59,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:59,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:59,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:59,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:36:59,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 324 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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 19:36:59,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:59,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:36:59,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:00,080 INFO L124 PetriNetUnfolderBase]: 2401/3541 cut-off events. [2024-11-07 19:37:00,080 INFO L125 PetriNetUnfolderBase]: For 7424/7717 co-relation queries the response was YES. [2024-11-07 19:37:00,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11817 conditions, 3541 events. 2401/3541 cut-off events. For 7424/7717 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17177 event pairs, 714 based on Foata normal form. 0/3185 useless extension candidates. Maximal degree in co-relation 7723. Up to 1498 conditions per place. [2024-11-07 19:37:00,097 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 37 changer transitions 0/174 dead transitions. [2024-11-07 19:37:00,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 174 transitions, 1368 flow [2024-11-07 19:37:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:37:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:37:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-11-07 19:37:00,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-11-07 19:37:00,099 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 324 flow. Second operand 12 states and 256 transitions. [2024-11-07 19:37:00,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 174 transitions, 1368 flow [2024-11-07 19:37:00,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 174 transitions, 1306 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-07 19:37:00,111 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 488 flow [2024-11-07 19:37:00,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-11-07 19:37:00,112 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-07 19:37:00,112 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 488 flow [2024-11-07 19:37:00,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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 19:37:00,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:00,112 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:00,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-07 19:37:00,313 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,SelfDestructingSolverStorable16 [2024-11-07 19:37:00,313 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:00,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash 463335020, now seen corresponding path program 2 times [2024-11-07 19:37:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756912464] [2024-11-07 19:37:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:00,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756912464] [2024-11-07 19:37:00,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756912464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:00,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340295490] [2024-11-07 19:37:00,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:37:00,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:00,423 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 19:37:00,424 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 19:37:00,503 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:37:00,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:00,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:37:00,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:00,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340295490] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:37:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-07 19:37:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513304106] [2024-11-07 19:37:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:00,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:37:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:37:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:37:00,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:37:00,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 19:37:00,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:00,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:37:00,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:01,033 INFO L124 PetriNetUnfolderBase]: 3142/4644 cut-off events. [2024-11-07 19:37:01,034 INFO L125 PetriNetUnfolderBase]: For 10298/10694 co-relation queries the response was YES. [2024-11-07 19:37:01,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16805 conditions, 4644 events. 3142/4644 cut-off events. For 10298/10694 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24031 event pairs, 782 based on Foata normal form. 28/4572 useless extension candidates. Maximal degree in co-relation 12775. Up to 1683 conditions per place. [2024-11-07 19:37:01,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2024-11-07 19:37:01,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 198 transitions, 1630 flow [2024-11-07 19:37:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:37:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:37:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-07 19:37:01,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-07 19:37:01,060 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 488 flow. Second operand 9 states and 201 transitions. [2024-11-07 19:37:01,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 198 transitions, 1630 flow [2024-11-07 19:37:01,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 198 transitions, 1622 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:37:01,079 INFO L231 Difference]: Finished difference. Result has 83 places, 112 transitions, 944 flow [2024-11-07 19:37:01,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=944, PETRI_PLACES=83, PETRI_TRANSITIONS=112} [2024-11-07 19:37:01,080 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-07 19:37:01,080 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 112 transitions, 944 flow [2024-11-07 19:37:01,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 19:37:01,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:01,081 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:01,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-07 19:37:01,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:37:01,281 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:01,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -586453984, now seen corresponding path program 3 times [2024-11-07 19:37:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296165069] [2024-11-07 19:37:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:01,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296165069] [2024-11-07 19:37:01,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296165069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444388272] [2024-11-07 19:37:01,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:37:01,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:01,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:01,385 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:37:01,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-07 19:37:01,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:37:01,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:01,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:37:01,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:01,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444388272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:01,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:01,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-07 19:37:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653621628] [2024-11-07 19:37:01,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:01,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:37:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:37:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:37:01,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:37:01,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 112 transitions, 944 flow. Second operand has 15 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:01,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:01,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:37:01,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:02,445 INFO L124 PetriNetUnfolderBase]: 4157/6116 cut-off events. [2024-11-07 19:37:02,446 INFO L125 PetriNetUnfolderBase]: For 23240/23770 co-relation queries the response was YES. [2024-11-07 19:37:02,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28109 conditions, 6116 events. 4157/6116 cut-off events. For 23240/23770 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32574 event pairs, 1108 based on Foata normal form. 26/6137 useless extension candidates. Maximal degree in co-relation 21938. Up to 2730 conditions per place. [2024-11-07 19:37:02,478 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 171 selfloop transitions, 125 changer transitions 0/301 dead transitions. [2024-11-07 19:37:02,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 301 transitions, 3005 flow [2024-11-07 19:37:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:37:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:37:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 330 transitions. [2024-11-07 19:37:02,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-07 19:37:02,480 INFO L175 Difference]: Start difference. First operand has 83 places, 112 transitions, 944 flow. Second operand 15 states and 330 transitions. [2024-11-07 19:37:02,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 301 transitions, 3005 flow [2024-11-07 19:37:02,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 301 transitions, 2982 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-07 19:37:02,587 INFO L231 Difference]: Finished difference. Result has 102 places, 177 transitions, 2066 flow [2024-11-07 19:37:02,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2066, PETRI_PLACES=102, PETRI_TRANSITIONS=177} [2024-11-07 19:37:02,587 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-11-07 19:37:02,587 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 177 transitions, 2066 flow [2024-11-07 19:37:02,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:02,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:02,588 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:02,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 19:37:02,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:02,788 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:02,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1548411352, now seen corresponding path program 4 times [2024-11-07 19:37:02,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:02,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737513965] [2024-11-07 19:37:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:02,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737513965] [2024-11-07 19:37:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737513965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461218531] [2024-11-07 19:37:02,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:37:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:02,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:37:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-07 19:37:02,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:37:02,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:02,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:37:02,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:03,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:03,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461218531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:03,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:03,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-07 19:37:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678900148] [2024-11-07 19:37:03,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:03,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:37:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:37:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:37:03,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-07 19:37:03,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 177 transitions, 2066 flow. Second operand has 14 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 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 19:37:03,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:03,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-07 19:37:03,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:04,519 INFO L124 PetriNetUnfolderBase]: 6145/8860 cut-off events. [2024-11-07 19:37:04,519 INFO L125 PetriNetUnfolderBase]: For 47653/47653 co-relation queries the response was YES. [2024-11-07 19:37:04,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48545 conditions, 8860 events. 6145/8860 cut-off events. For 47653/47653 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 45700 event pairs, 489 based on Foata normal form. 32/8892 useless extension candidates. Maximal degree in co-relation 43418. Up to 1876 conditions per place. [2024-11-07 19:37:04,563 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 326 selfloop transitions, 296 changer transitions 0/623 dead transitions. [2024-11-07 19:37:04,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 623 transitions, 7708 flow [2024-11-07 19:37:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-07 19:37:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-07 19:37:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 544 transitions. [2024-11-07 19:37:04,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-11-07 19:37:04,565 INFO L175 Difference]: Start difference. First operand has 102 places, 177 transitions, 2066 flow. Second operand 26 states and 544 transitions. [2024-11-07 19:37:04,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 623 transitions, 7708 flow [2024-11-07 19:37:04,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 623 transitions, 7344 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-07 19:37:04,820 INFO L231 Difference]: Finished difference. Result has 131 places, 388 transitions, 5223 flow [2024-11-07 19:37:04,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5223, PETRI_PLACES=131, PETRI_TRANSITIONS=388} [2024-11-07 19:37:04,821 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-11-07 19:37:04,821 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 388 transitions, 5223 flow [2024-11-07 19:37:04,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 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 19:37:04,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:04,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:04,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-07 19:37:05,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:05,025 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:05,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1826264120, now seen corresponding path program 5 times [2024-11-07 19:37:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750993079] [2024-11-07 19:37:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750993079] [2024-11-07 19:37:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750993079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392116963] [2024-11-07 19:37:05,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:37:05,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:05,167 INFO L229 MonitoredProcess]: Starting monitored process 15 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 19:37:05,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-07 19:37:05,247 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:37:05,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:05,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:37:05,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:05,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392116963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:05,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:05,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 19:37:05,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146939684] [2024-11-07 19:37:05,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:05,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:37:05,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:37:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:37:05,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-07 19:37:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 388 transitions, 5223 flow. Second operand has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:05,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:05,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-07 19:37:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:07,110 INFO L124 PetriNetUnfolderBase]: 6796/9760 cut-off events. [2024-11-07 19:37:07,111 INFO L125 PetriNetUnfolderBase]: For 63291/63291 co-relation queries the response was YES. [2024-11-07 19:37:07,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59188 conditions, 9760 events. 6796/9760 cut-off events. For 63291/63291 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 50576 event pairs, 634 based on Foata normal form. 34/9794 useless extension candidates. Maximal degree in co-relation 57533. Up to 2407 conditions per place. [2024-11-07 19:37:07,167 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 224 selfloop transitions, 502 changer transitions 0/727 dead transitions. [2024-11-07 19:37:07,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 727 transitions, 9873 flow [2024-11-07 19:37:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-07 19:37:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-07 19:37:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 468 transitions. [2024-11-07 19:37:07,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-11-07 19:37:07,169 INFO L175 Difference]: Start difference. First operand has 131 places, 388 transitions, 5223 flow. Second operand 22 states and 468 transitions. [2024-11-07 19:37:07,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 727 transitions, 9873 flow [2024-11-07 19:37:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 727 transitions, 9570 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-11-07 19:37:07,805 INFO L231 Difference]: Finished difference. Result has 153 places, 606 transitions, 8872 flow [2024-11-07 19:37:07,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8872, PETRI_PLACES=153, PETRI_TRANSITIONS=606} [2024-11-07 19:37:07,805 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-11-07 19:37:07,805 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 606 transitions, 8872 flow [2024-11-07 19:37:07,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:07,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:07,806 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:07,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-07 19:37:08,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-07 19:37:08,006 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:08,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 164176238, now seen corresponding path program 6 times [2024-11-07 19:37:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713681661] [2024-11-07 19:37:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:08,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713681661] [2024-11-07 19:37:08,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713681661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967782415] [2024-11-07 19:37:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:37:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:08,098 INFO L229 MonitoredProcess]: Starting monitored process 16 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 19:37:08,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 19:37:08,178 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-07 19:37:08,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:08,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:37:08,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:08,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:08,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967782415] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:08,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:37:08,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-07 19:37:08,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498635336] [2024-11-07 19:37:08,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:08,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:37:08,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:37:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:37:08,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:37:08,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 606 transitions, 8872 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 19:37:08,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:08,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:37:08,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:09,454 INFO L124 PetriNetUnfolderBase]: 5101/7487 cut-off events. [2024-11-07 19:37:09,454 INFO L125 PetriNetUnfolderBase]: For 61439/62028 co-relation queries the response was YES. [2024-11-07 19:37:09,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49701 conditions, 7487 events. 5101/7487 cut-off events. For 61439/62028 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40792 event pairs, 564 based on Foata normal form. 28/7511 useless extension candidates. Maximal degree in co-relation 48332. Up to 2240 conditions per place. [2024-11-07 19:37:09,516 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 294 changer transitions 0/661 dead transitions. [2024-11-07 19:37:09,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 661 transitions, 10556 flow [2024-11-07 19:37:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:37:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:37:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-07 19:37:09,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-11-07 19:37:09,518 INFO L175 Difference]: Start difference. First operand has 153 places, 606 transitions, 8872 flow. Second operand 8 states and 184 transitions. [2024-11-07 19:37:09,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 661 transitions, 10556 flow [2024-11-07 19:37:10,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 661 transitions, 10225 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-11-07 19:37:10,134 INFO L231 Difference]: Finished difference. Result has 156 places, 602 transitions, 9173 flow [2024-11-07 19:37:10,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8431, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9173, PETRI_PLACES=156, PETRI_TRANSITIONS=602} [2024-11-07 19:37:10,134 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-11-07 19:37:10,134 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 602 transitions, 9173 flow [2024-11-07 19:37:10,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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 19:37:10,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:10,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:10,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 19:37:10,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:10,335 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:10,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1410141264, now seen corresponding path program 1 times [2024-11-07 19:37:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:10,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276559739] [2024-11-07 19:37:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:10,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:10,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:10,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276559739] [2024-11-07 19:37:10,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276559739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:10,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699181056] [2024-11-07 19:37:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:10,790 INFO L229 MonitoredProcess]: Starting monitored process 17 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 19:37:10,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 19:37:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:10,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:37:10,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:10,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-07 19:37:11,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:11,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:11,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2024-11-07 19:37:11,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:11,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-07 19:37:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699181056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:12,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:12,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-07 19:37:12,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486303038] [2024-11-07 19:37:12,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:12,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:37:12,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:37:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:37:13,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:37:13,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 602 transitions, 9173 flow. Second operand has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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 19:37:13,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:13,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:37:13,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:15,543 INFO L124 PetriNetUnfolderBase]: 6300/9360 cut-off events. [2024-11-07 19:37:15,543 INFO L125 PetriNetUnfolderBase]: For 96365/97092 co-relation queries the response was YES. [2024-11-07 19:37:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 9360 events. 6300/9360 cut-off events. For 96365/97092 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 53236 event pairs, 583 based on Foata normal form. 202/9521 useless extension candidates. Maximal degree in co-relation 64428. Up to 5746 conditions per place. [2024-11-07 19:37:15,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 827 selfloop transitions, 413 changer transitions 8/1309 dead transitions. [2024-11-07 19:37:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 1309 transitions, 21874 flow [2024-11-07 19:37:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-07 19:37:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-07 19:37:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 468 transitions. [2024-11-07 19:37:15,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6007702182284981 [2024-11-07 19:37:15,608 INFO L175 Difference]: Start difference. First operand has 156 places, 602 transitions, 9173 flow. Second operand 19 states and 468 transitions. [2024-11-07 19:37:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 1309 transitions, 21874 flow [2024-11-07 19:37:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1309 transitions, 21416 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-07 19:37:16,443 INFO L231 Difference]: Finished difference. Result has 178 places, 899 transitions, 15634 flow [2024-11-07 19:37:16,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8979, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15634, PETRI_PLACES=178, PETRI_TRANSITIONS=899} [2024-11-07 19:37:16,444 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-11-07 19:37:16,444 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 899 transitions, 15634 flow [2024-11-07 19:37:16,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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 19:37:16,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:16,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:16,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 19:37:16,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:16,649 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:16,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash -937503956, now seen corresponding path program 2 times [2024-11-07 19:37:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:16,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106899665] [2024-11-07 19:37:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:16,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106899665] [2024-11-07 19:37:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106899665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687300734] [2024-11-07 19:37:16,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:37:16,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:16,987 INFO L229 MonitoredProcess]: Starting monitored process 18 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 19:37:16,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 19:37:17,075 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:37:17,075 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:17,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:37:17,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:17,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-07 19:37:17,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:17,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687300734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:17,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:17,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-07 19:37:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684080282] [2024-11-07 19:37:17,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:17,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:37:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:37:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:37:18,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:37:18,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 899 transitions, 15634 flow. Second operand has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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 19:37:18,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:18,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:37:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:21,140 INFO L124 PetriNetUnfolderBase]: 8343/12297 cut-off events. [2024-11-07 19:37:21,140 INFO L125 PetriNetUnfolderBase]: For 144356/145031 co-relation queries the response was YES. [2024-11-07 19:37:21,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89996 conditions, 12297 events. 8343/12297 cut-off events. For 144356/145031 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 71297 event pairs, 715 based on Foata normal form. 3/12299 useless extension candidates. Maximal degree in co-relation 89192. Up to 8767 conditions per place. [2024-11-07 19:37:21,272 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 1047 selfloop transitions, 535 changer transitions 4/1591 dead transitions. [2024-11-07 19:37:21,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1591 transitions, 29515 flow [2024-11-07 19:37:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-07 19:37:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-07 19:37:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 590 transitions. [2024-11-07 19:37:21,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5329719963866305 [2024-11-07 19:37:21,274 INFO L175 Difference]: Start difference. First operand has 178 places, 899 transitions, 15634 flow. Second operand 27 states and 590 transitions. [2024-11-07 19:37:21,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1591 transitions, 29515 flow [2024-11-07 19:37:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1591 transitions, 28667 flow, removed 361 selfloop flow, removed 4 redundant places. [2024-11-07 19:37:23,119 INFO L231 Difference]: Finished difference. Result has 217 places, 1254 transitions, 24200 flow [2024-11-07 19:37:23,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15095, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24200, PETRI_PLACES=217, PETRI_TRANSITIONS=1254} [2024-11-07 19:37:23,121 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-11-07 19:37:23,121 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 1254 transitions, 24200 flow [2024-11-07 19:37:23,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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 19:37:23,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:23,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:23,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 19:37:23,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:23,322 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:23,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1004365218, now seen corresponding path program 1 times [2024-11-07 19:37:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:23,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434338633] [2024-11-07 19:37:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:23,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:23,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434338633] [2024-11-07 19:37:23,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434338633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:23,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829764338] [2024-11-07 19:37:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:23,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:23,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:23,572 INFO L229 MonitoredProcess]: Starting monitored process 19 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 19:37:23,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 19:37:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:23,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:37:23,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:23,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:23,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:24,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:24,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-11-07 19:37:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829764338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:24,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:24,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 16 [2024-11-07 19:37:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844680299] [2024-11-07 19:37:24,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:24,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:37:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:37:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:37:24,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-07 19:37:24,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1254 transitions, 24200 flow. Second operand has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 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 19:37:24,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:24,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-07 19:37:24,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:26,899 INFO L124 PetriNetUnfolderBase]: 8089/12296 cut-off events. [2024-11-07 19:37:26,899 INFO L125 PetriNetUnfolderBase]: For 193349/194868 co-relation queries the response was YES. [2024-11-07 19:37:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98289 conditions, 12296 events. 8089/12296 cut-off events. For 193349/194868 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 76393 event pairs, 405 based on Foata normal form. 495/12681 useless extension candidates. Maximal degree in co-relation 97592. Up to 7893 conditions per place. [2024-11-07 19:37:27,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 846 selfloop transitions, 556 changer transitions 30/1643 dead transitions. [2024-11-07 19:37:27,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1643 transitions, 33720 flow [2024-11-07 19:37:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:37:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:37:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-11-07 19:37:27,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554878048780488 [2024-11-07 19:37:27,007 INFO L175 Difference]: Start difference. First operand has 217 places, 1254 transitions, 24200 flow. Second operand 8 states and 215 transitions. [2024-11-07 19:37:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1643 transitions, 33720 flow [2024-11-07 19:37:29,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1643 transitions, 33111 flow, removed 213 selfloop flow, removed 6 redundant places. [2024-11-07 19:37:29,353 INFO L231 Difference]: Finished difference. Result has 222 places, 1425 transitions, 29344 flow [2024-11-07 19:37:29,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23735, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=29344, PETRI_PLACES=222, PETRI_TRANSITIONS=1425} [2024-11-07 19:37:29,354 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-11-07 19:37:29,354 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 1425 transitions, 29344 flow [2024-11-07 19:37:29,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 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 19:37:29,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:29,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:29,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-07 19:37:29,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-07 19:37:29,555 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:29,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 608407100, now seen corresponding path program 2 times [2024-11-07 19:37:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940335756] [2024-11-07 19:37:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940335756] [2024-11-07 19:37:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940335756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466958267] [2024-11-07 19:37:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:37:29,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:29,900 INFO L229 MonitoredProcess]: Starting monitored process 20 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 19:37:29,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-07 19:37:29,979 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:37:29,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:29,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:37:29,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:30,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:30,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:30,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:30,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-11-07 19:37:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466958267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-07 19:37:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357047367] [2024-11-07 19:37:30,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:30,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:37:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:37:30,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:37:30,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-07 19:37:30,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1425 transitions, 29344 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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 19:37:30,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:30,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-07 19:37:30,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:34,068 INFO L124 PetriNetUnfolderBase]: 8810/13459 cut-off events. [2024-11-07 19:37:34,069 INFO L125 PetriNetUnfolderBase]: For 225979/227471 co-relation queries the response was YES. [2024-11-07 19:37:34,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110903 conditions, 13459 events. 8810/13459 cut-off events. For 225979/227471 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 84915 event pairs, 551 based on Foata normal form. 498/13753 useless extension candidates. Maximal degree in co-relation 110169. Up to 10188 conditions per place. [2024-11-07 19:37:34,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 1123 selfloop transitions, 281 changer transitions 4/1619 dead transitions. [2024-11-07 19:37:34,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1619 transitions, 35416 flow [2024-11-07 19:37:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:37:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:37:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-07 19:37:34,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-11-07 19:37:34,282 INFO L175 Difference]: Start difference. First operand has 222 places, 1425 transitions, 29344 flow. Second operand 9 states and 225 transitions. [2024-11-07 19:37:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1619 transitions, 35416 flow [2024-11-07 19:37:37,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1619 transitions, 35155 flow, removed 111 selfloop flow, removed 3 redundant places. [2024-11-07 19:37:37,714 INFO L231 Difference]: Finished difference. Result has 230 places, 1520 transitions, 31994 flow [2024-11-07 19:37:37,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=29095, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=31994, PETRI_PLACES=230, PETRI_TRANSITIONS=1520} [2024-11-07 19:37:37,715 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-11-07 19:37:37,715 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 1520 transitions, 31994 flow [2024-11-07 19:37:37,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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 19:37:37,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:37,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:37,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-07 19:37:37,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:37,916 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:37,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1170475234, now seen corresponding path program 3 times [2024-11-07 19:37:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:37,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122326489] [2024-11-07 19:37:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122326489] [2024-11-07 19:37:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122326489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:38,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015642135] [2024-11-07 19:37:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:37:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:38,149 INFO L229 MonitoredProcess]: Starting monitored process 21 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 19:37:38,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-07 19:37:38,270 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 19:37:38,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:38,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-07 19:37:38,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:38,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-07 19:37:38,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:38,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:38,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015642135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:38,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:38,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 18 [2024-11-07 19:37:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045316614] [2024-11-07 19:37:38,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:38,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:37:38,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:37:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:37:38,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-07 19:37:38,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 1520 transitions, 31994 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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 19:37:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-07 19:37:38,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:42,424 INFO L124 PetriNetUnfolderBase]: 9901/15110 cut-off events. [2024-11-07 19:37:42,424 INFO L125 PetriNetUnfolderBase]: For 274693/276315 co-relation queries the response was YES. [2024-11-07 19:37:42,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127474 conditions, 15110 events. 9901/15110 cut-off events. For 274693/276315 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 97212 event pairs, 656 based on Foata normal form. 514/15395 useless extension candidates. Maximal degree in co-relation 126729. Up to 10999 conditions per place. [2024-11-07 19:37:42,549 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 1214 selfloop transitions, 431 changer transitions 21/1877 dead transitions. [2024-11-07 19:37:42,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1877 transitions, 42175 flow [2024-11-07 19:37:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:37:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:37:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-11-07 19:37:42,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-11-07 19:37:42,550 INFO L175 Difference]: Start difference. First operand has 230 places, 1520 transitions, 31994 flow. Second operand 9 states and 227 transitions. [2024-11-07 19:37:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1877 transitions, 42175 flow [2024-11-07 19:37:45,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1877 transitions, 41917 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-11-07 19:37:45,888 INFO L231 Difference]: Finished difference. Result has 237 places, 1714 transitions, 38006 flow [2024-11-07 19:37:45,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=31736, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38006, PETRI_PLACES=237, PETRI_TRANSITIONS=1714} [2024-11-07 19:37:45,890 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-11-07 19:37:45,890 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 1714 transitions, 38006 flow [2024-11-07 19:37:45,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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 19:37:45,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:45,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:45,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-07 19:37:46,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-07 19:37:46,091 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:46,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1008110386, now seen corresponding path program 3 times [2024-11-07 19:37:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:46,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105690250] [2024-11-07 19:37:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:46,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105690250] [2024-11-07 19:37:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105690250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298813729] [2024-11-07 19:37:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:37:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:46,378 INFO L229 MonitoredProcess]: Starting monitored process 22 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 19:37:46,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-07 19:37:46,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 19:37:46,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:46,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:37:46,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:46,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-07 19:37:46,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:46,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:47,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298813729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:47,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-07 19:37:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878171205] [2024-11-07 19:37:47,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:47,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:37:47,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:37:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:37:47,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-07 19:37:47,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1714 transitions, 38006 flow. Second operand has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 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 19:37:47,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:47,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-07 19:37:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:52,869 INFO L124 PetriNetUnfolderBase]: 11666/17752 cut-off events. [2024-11-07 19:37:52,869 INFO L125 PetriNetUnfolderBase]: For 349572/351133 co-relation queries the response was YES. [2024-11-07 19:37:52,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152485 conditions, 17752 events. 11666/17752 cut-off events. For 349572/351133 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 116055 event pairs, 592 based on Foata normal form. 407/18022 useless extension candidates. Maximal degree in co-relation 151583. Up to 12613 conditions per place. [2024-11-07 19:37:53,034 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 1247 selfloop transitions, 901 changer transitions 7/2261 dead transitions. [2024-11-07 19:37:53,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 2261 transitions, 52698 flow [2024-11-07 19:37:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-07 19:37:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-07 19:37:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 421 transitions. [2024-11-07 19:37:53,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5704607046070461 [2024-11-07 19:37:53,036 INFO L175 Difference]: Start difference. First operand has 237 places, 1714 transitions, 38006 flow. Second operand 18 states and 421 transitions. [2024-11-07 19:37:53,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 2261 transitions, 52698 flow [2024-11-07 19:37:58,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 2261 transitions, 51854 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-11-07 19:37:58,171 INFO L231 Difference]: Finished difference. Result has 254 places, 2085 transitions, 48804 flow [2024-11-07 19:37:58,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=37299, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=48804, PETRI_PLACES=254, PETRI_TRANSITIONS=2085} [2024-11-07 19:37:58,173 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-11-07 19:37:58,174 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 2085 transitions, 48804 flow [2024-11-07 19:37:58,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 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 19:37:58,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:58,174 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:58,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-07 19:37:58,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-07 19:37:58,379 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:37:58,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1916934526, now seen corresponding path program 4 times [2024-11-07 19:37:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118221032] [2024-11-07 19:37:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:58,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118221032] [2024-11-07 19:37:58,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118221032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897715989] [2024-11-07 19:37:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:37:58,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:58,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:58,756 INFO L229 MonitoredProcess]: Starting monitored process 23 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 19:37:58,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-07 19:37:58,826 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:37:58,826 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:58,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:37:58,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:58,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-07 19:37:59,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:37:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:59,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:37:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897715989] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:59,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-07 19:37:59,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178966016] [2024-11-07 19:37:59,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:59,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:37:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:37:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:37:59,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-07 19:37:59,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 2085 transitions, 48804 flow. Second operand has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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 19:37:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-07 19:37:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand