./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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-array-sum-alt2.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', '1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a'] 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-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:34:52,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:34:52,145 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:34:52,152 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:34:52,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:34:52,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:34:52,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:34:52,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:34:52,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:34:52,175 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:34:52,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:34:52,175 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:34:52,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:34:52,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:34:52,176 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:34:52,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:34:52,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:34:52,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:34:52,178 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:34:52,178 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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-07 19:34:52,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:34:52,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:34:52,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:34:52,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:34:52,392 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:34:52,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-07 19:34:53,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:34:53,833 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:34:53,835 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-07 19:34:53,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6d9cf39ba/3dd84c7e76a347828eed5bdcdc51c080/FLAGb8be2b47c [2024-11-07 19:34:54,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6d9cf39ba/3dd84c7e76a347828eed5bdcdc51c080 [2024-11-07 19:34:54,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:34:54,185 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:34:54,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:34:54,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:34:54,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:34:54,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9aa270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54, skipping insertion in model container [2024-11-07 19:34:54,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,201 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:34:54,301 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 19:34:54,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:34:54,309 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:34:54,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:34:54,344 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:34:54,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54 WrapperNode [2024-11-07 19:34:54,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:34:54,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:34:54,346 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:34:54,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:34:54,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,377 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 184 [2024-11-07 19:34:54,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:34:54,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:34:54,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:34:54,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:34:54,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,407 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 19:34:54,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:34:54,416 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:34:54,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:34:54,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:34:54,417 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (1/1) ... [2024-11-07 19:34:54,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:34:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:54,440 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 19:34:54,443 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 19:34:54,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:34:54,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:34:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:34:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:34:54,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:34:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:34:54,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:34:54,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:34:54,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:34:54,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:34:54,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:34:54,462 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 19:34:54,552 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:34:54,554 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:34:54,817 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:34:54,817 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:34:55,042 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:34:55,042 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:34:55,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:55 BoogieIcfgContainer [2024-11-07 19:34:55,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:34:55,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:34:55,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:34:55,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:34:55,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:34:54" (1/3) ... [2024-11-07 19:34:55,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc6bad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:55, skipping insertion in model container [2024-11-07 19:34:55,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:54" (2/3) ... [2024-11-07 19:34:55,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc6bad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:55, skipping insertion in model container [2024-11-07 19:34:55,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:55" (3/3) ... [2024-11-07 19:34:55,052 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-07 19:34:55,062 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:34:55,063 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-07 19:34:55,063 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:34:55,117 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:34:55,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-11-07 19:34:55,174 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-11-07 19:34:55,178 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:34:55,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-11-07 19:34:55,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-11-07 19:34:55,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-11-07 19:34:55,201 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:34:55,225 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;@ab47471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:34:55,225 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-07 19:34:55,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:34:55,231 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:34:55,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:34:55,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:55,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:34:55,232 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 19:34:55,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 608571, now seen corresponding path program 1 times [2024-11-07 19:34:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100840113] [2024-11-07 19:34:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:55,428 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 19:34:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100840113] [2024-11-07 19:34:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100840113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:55,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:55,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:34:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577649538] [2024-11-07 19:34:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:55,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:34:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:55,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:34:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:34:55,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:55,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:34:55,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:55,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:55,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:55,802 INFO L124 PetriNetUnfolderBase]: 1316/1925 cut-off events. [2024-11-07 19:34:55,803 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-07 19:34:55,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1925 events. 1316/1925 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9784 event pairs, 1060 based on Foata normal form. 1/1372 useless extension candidates. Maximal degree in co-relation 3632. Up to 1877 conditions per place. [2024-11-07 19:34:55,818 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-07 19:34:55,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-07 19:34:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:34:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:34:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-07 19:34:55,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-11-07 19:34:55,830 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-11-07 19:34:55,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-07 19:34:55,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:34:55,839 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-07 19:34:55,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-07 19:34:55,845 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-11-07 19:34:55,846 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-07 19:34:55,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:34:55,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:55,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:34:55,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:34:55,847 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 19:34:55,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash 608572, now seen corresponding path program 1 times [2024-11-07 19:34:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127270296] [2024-11-07 19:34:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:56,085 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 19:34:56,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:56,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127270296] [2024-11-07 19:34:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127270296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:56,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:56,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:34:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401372122] [2024-11-07 19:34:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:56,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:34:56,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:34:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:34:56,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:56,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:34:56,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:56,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:56,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:56,429 INFO L124 PetriNetUnfolderBase]: 1317/1928 cut-off events. [2024-11-07 19:34:56,429 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:34:56,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1928 events. 1317/1928 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9832 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3838. Up to 1882 conditions per place. [2024-11-07 19:34:56,438 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-07 19:34:56,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-07 19:34:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:34:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:34:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-07 19:34:56,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-07 19:34:56,441 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-07 19:34:56,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-07 19:34:56,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:56,442 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-07 19:34:56,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-07 19:34:56,443 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-07 19:34:56,443 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-07 19:34:56,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:34:56,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:56,443 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:34:56,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:34:56,443 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 19:34:56,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash 584856210, now seen corresponding path program 1 times [2024-11-07 19:34:56,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:56,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171148627] [2024-11-07 19:34:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:56,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:56,706 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 19:34:56,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:56,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171148627] [2024-11-07 19:34:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171148627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:56,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465053257] [2024-11-07 19:34:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:56,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:56,713 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 19:34:56,714 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 19:34:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:56,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:34:56,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:56,833 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 19:34:57,005 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 19:34:57,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:57,092 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 19:34:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465053257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:57,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:34:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229517538] [2024-11-07 19:34:57,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:57,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:34:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:34:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:34:57,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:57,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 19:34:57,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:57,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:57,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:57,490 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-11-07 19:34:57,490 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:34:57,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3867 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9798 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3845. Up to 1878 conditions per place. [2024-11-07 19:34:57,498 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-07 19:34:57,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-07 19:34:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:34:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:34:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-07 19:34:57,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-07 19:34:57,501 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-07 19:34:57,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-07 19:34:57,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:34:57,502 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-07 19:34:57,502 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-07 19:34:57,503 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-11-07 19:34:57,503 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-07 19:34:57,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 19:34:57,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:57,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:34:57,521 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 19:34:57,708 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 19:34:57,708 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:57,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:57,709 INFO L85 PathProgramCache]: Analyzing trace with hash 952797354, now seen corresponding path program 1 times [2024-11-07 19:34:57,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:57,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577490330] [2024-11-07 19:34:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:57,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:57,773 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 19:34:57,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:57,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577490330] [2024-11-07 19:34:57,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577490330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:57,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:57,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:34:57,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238049299] [2024-11-07 19:34:57,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:57,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:34:57,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:34:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:34:57,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:57,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 19:34:57,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:57,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:57,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:57,885 INFO L124 PetriNetUnfolderBase]: 793/1173 cut-off events. [2024-11-07 19:34:57,885 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-07 19:34:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1173 events. 793/1173 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5312 event pairs, 608 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 2338. Up to 1135 conditions per place. [2024-11-07 19:34:57,890 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-07 19:34:57,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 172 flow [2024-11-07 19:34:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:34:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:34:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-07 19:34:57,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-07 19:34:57,892 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 4 states and 68 transitions. [2024-11-07 19:34:57,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 172 flow [2024-11-07 19:34:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-07 19:34:57,893 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2024-11-07 19:34:57,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, 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=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-07 19:34:57,893 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2024-11-07 19:34:57,893 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2024-11-07 19:34:57,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 19:34:57,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:57,893 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:34:57,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:34:57,893 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:57,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash 952797355, now seen corresponding path program 1 times [2024-11-07 19:34:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031061982] [2024-11-07 19:34:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:57,966 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 19:34:57,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031061982] [2024-11-07 19:34:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031061982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:34:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928479917] [2024-11-07 19:34:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:57,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:34:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:34:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:34:57,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:57,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:34:57,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:57,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:57,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:58,187 INFO L124 PetriNetUnfolderBase]: 1374/2050 cut-off events. [2024-11-07 19:34:58,187 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-07 19:34:58,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 2050 events. 1374/2050 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10084 event pairs, 908 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2756. Up to 1347 conditions per place. [2024-11-07 19:34:58,198 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-07 19:34:58,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 306 flow [2024-11-07 19:34:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:34:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:34:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-07 19:34:58,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-07 19:34:58,200 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 5 states and 116 transitions. [2024-11-07 19:34:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 306 flow [2024-11-07 19:34:58,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:58,201 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 105 flow [2024-11-07 19:34:58,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=105, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-07 19:34:58,202 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-07 19:34:58,202 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 105 flow [2024-11-07 19:34:58,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:34:58,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:58,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:58,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:34:58,202 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:58,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1228269675, now seen corresponding path program 1 times [2024-11-07 19:34:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369584582] [2024-11-07 19:34:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:58,335 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 19:34:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369584582] [2024-11-07 19:34:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369584582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123502567] [2024-11-07 19:34:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:58,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:58,338 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 19:34:58,339 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 19:34:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:58,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:34:58,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:58,442 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 19:34:58,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:58,476 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 19:34:58,484 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 19:34:58,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123502567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:58,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-07 19:34:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912120786] [2024-11-07 19:34:58,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:58,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:34:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:34:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:34:58,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-07 19:34:58,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 19:34:58,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:58,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-07 19:34:58,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:58,884 INFO L124 PetriNetUnfolderBase]: 1583/2381 cut-off events. [2024-11-07 19:34:58,884 INFO L125 PetriNetUnfolderBase]: For 495/554 co-relation queries the response was YES. [2024-11-07 19:34:58,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2381 events. 1583/2381 cut-off events. For 495/554 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12067 event pairs, 841 based on Foata normal form. 0/2057 useless extension candidates. Maximal degree in co-relation 3615. Up to 987 conditions per place. [2024-11-07 19:34:58,893 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-11-07 19:34:58,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 397 flow [2024-11-07 19:34:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:34:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:34:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-11-07 19:34:58,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-11-07 19:34:58,895 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 105 flow. Second operand 7 states and 158 transitions. [2024-11-07 19:34:58,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 397 flow [2024-11-07 19:34:58,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 91 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:58,897 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 141 flow [2024-11-07 19:34:58,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-07 19:34:58,897 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-07 19:34:58,897 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 141 flow [2024-11-07 19:34:58,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 19:34:58,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:58,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:58,911 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 19:34:59,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:59,104 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:59,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 809084184, now seen corresponding path program 1 times [2024-11-07 19:34:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:59,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562389070] [2024-11-07 19:34:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:59,151 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 19:34:59,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562389070] [2024-11-07 19:34:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562389070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:59,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:59,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:34:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924736461] [2024-11-07 19:34:59,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:59,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:34:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:34:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:34:59,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:59,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 19:34:59,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:59,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:59,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:59,363 INFO L124 PetriNetUnfolderBase]: 1597/2360 cut-off events. [2024-11-07 19:34:59,363 INFO L125 PetriNetUnfolderBase]: For 2106/2237 co-relation queries the response was YES. [2024-11-07 19:34:59,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 2360 events. 1597/2360 cut-off events. For 2106/2237 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10917 event pairs, 1152 based on Foata normal form. 0/2062 useless extension candidates. Maximal degree in co-relation 5089. Up to 1932 conditions per place. [2024-11-07 19:34:59,372 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-07 19:34:59,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 345 flow [2024-11-07 19:34:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:34:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:34:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-07 19:34:59,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-07 19:34:59,373 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 141 flow. Second operand 5 states and 109 transitions. [2024-11-07 19:34:59,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 345 flow [2024-11-07 19:34:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 331 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 19:34:59,375 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 154 flow [2024-11-07 19:34:59,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-11-07 19:34:59,375 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-07 19:34:59,376 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 154 flow [2024-11-07 19:34:59,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 19:34:59,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:59,376 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:59,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:34:59,376 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:59,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash 133990468, now seen corresponding path program 1 times [2024-11-07 19:34:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:59,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701630938] [2024-11-07 19:34:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:59,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:59,428 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 19:34:59,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701630938] [2024-11-07 19:34:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701630938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:59,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:59,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:34:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109332192] [2024-11-07 19:34:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:59,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:34:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:34:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:34:59,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:34:59,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 19:34:59,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:59,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:34:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:59,649 INFO L124 PetriNetUnfolderBase]: 1468/2133 cut-off events. [2024-11-07 19:34:59,649 INFO L125 PetriNetUnfolderBase]: For 2057/2277 co-relation queries the response was YES. [2024-11-07 19:34:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5737 conditions, 2133 events. 1468/2133 cut-off events. For 2057/2277 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9754 event pairs, 1104 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5084. Up to 1890 conditions per place. [2024-11-07 19:34:59,658 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-07 19:34:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 332 flow [2024-11-07 19:34:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:34:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:34:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-07 19:34:59,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-07 19:34:59,659 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 154 flow. Second operand 5 states and 102 transitions. [2024-11-07 19:34:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 332 flow [2024-11-07 19:34:59,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:59,662 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 174 flow [2024-11-07 19:34:59,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-11-07 19:34:59,662 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-07 19:34:59,662 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 174 flow [2024-11-07 19:34:59,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 19:34:59,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:59,663 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:59,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:34:59,663 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:34:59,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash 747708802, now seen corresponding path program 1 times [2024-11-07 19:34:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:59,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480915293] [2024-11-07 19:34:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:59,794 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 19:34:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480915293] [2024-11-07 19:34:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480915293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422030731] [2024-11-07 19:34:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:59,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:59,797 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 19:34:59,798 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 19:34:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:59,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:34:59,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:59,897 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 19:34:59,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:59,928 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 19:34:59,935 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 19:34:59,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422030731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:59,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:59,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-07 19:34:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936807796] [2024-11-07 19:34:59,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:59,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:34:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:34:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:34:59,964 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-07 19:34:59,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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 19:34:59,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:59,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-07 19:34:59,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:00,365 INFO L124 PetriNetUnfolderBase]: 1811/2718 cut-off events. [2024-11-07 19:35:00,365 INFO L125 PetriNetUnfolderBase]: For 2624/2898 co-relation queries the response was YES. [2024-11-07 19:35:00,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 2718 events. 1811/2718 cut-off events. For 2624/2898 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13186 event pairs, 734 based on Foata normal form. 0/2518 useless extension candidates. Maximal degree in co-relation 6735. Up to 1389 conditions per place. [2024-11-07 19:35:00,376 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 79 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-07 19:35:00,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 520 flow [2024-11-07 19:35:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:35:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:35:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-07 19:35:00,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-11-07 19:35:00,378 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 174 flow. Second operand 7 states and 150 transitions. [2024-11-07 19:35:00,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 520 flow [2024-11-07 19:35:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:35:00,382 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 210 flow [2024-11-07 19:35:00,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-07 19:35:00,382 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-07 19:35:00,382 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 210 flow [2024-11-07 19:35:00,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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 19:35:00,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:00,383 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:35:00,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:00,583 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 19:35:00,584 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:35:00,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1740092478, now seen corresponding path program 1 times [2024-11-07 19:35:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828805317] [2024-11-07 19:35:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:00,662 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 19:35:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828805317] [2024-11-07 19:35:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828805317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890446322] [2024-11-07 19:35:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:00,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:00,666 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 19:35:00,669 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 19:35:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:00,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:35:00,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:00,780 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 19:35:00,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:00,821 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 19:35:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890446322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:00,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:00,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:35:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369294592] [2024-11-07 19:35:00,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:00,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:35:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:35:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:35:00,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:00,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 19:35:00,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:00,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:00,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:01,291 INFO L124 PetriNetUnfolderBase]: 3628/5286 cut-off events. [2024-11-07 19:35:01,292 INFO L125 PetriNetUnfolderBase]: For 6900/7301 co-relation queries the response was YES. [2024-11-07 19:35:01,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16627 conditions, 5286 events. 3628/5286 cut-off events. For 6900/7301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27393 event pairs, 2002 based on Foata normal form. 86/5144 useless extension candidates. Maximal degree in co-relation 9553. Up to 2940 conditions per place. [2024-11-07 19:35:01,317 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-07 19:35:01,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 744 flow [2024-11-07 19:35:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:35:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:35:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-07 19:35:01,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-07 19:35:01,318 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 210 flow. Second operand 8 states and 165 transitions. [2024-11-07 19:35:01,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 744 flow [2024-11-07 19:35:01,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 723 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:01,329 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 296 flow [2024-11-07 19:35:01,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-07 19:35:01,330 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-11-07 19:35:01,331 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 296 flow [2024-11-07 19:35:01,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 19:35:01,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:01,331 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:35:01,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:01,531 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 19:35:01,532 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:35:01,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1281790510, now seen corresponding path program 1 times [2024-11-07 19:35:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69034476] [2024-11-07 19:35:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:01,696 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 19:35:01,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69034476] [2024-11-07 19:35:01,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69034476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887859224] [2024-11-07 19:35:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:01,703 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 19:35:01,704 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 19:35:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:01,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:35:01,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:01,958 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 19:35:01,958 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:35:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887859224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:35:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:35:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-07 19:35:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650513541] [2024-11-07 19:35:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:01,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:35:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:35:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:35:02,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:02,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 19:35:02,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:02,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:02,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:02,373 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-11-07 19:35:02,374 INFO L125 PetriNetUnfolderBase]: For 10587/11050 co-relation queries the response was YES. [2024-11-07 19:35:02,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 4337 events. 2977/4337 cut-off events. For 10587/11050 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21635 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8070. Up to 1920 conditions per place. [2024-11-07 19:35:02,396 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-07 19:35:02,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 816 flow [2024-11-07 19:35:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:35:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:35:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-07 19:35:02,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-07 19:35:02,398 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 296 flow. Second operand 6 states and 110 transitions. [2024-11-07 19:35:02,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 816 flow [2024-11-07 19:35:02,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 801 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:35:02,406 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 307 flow [2024-11-07 19:35:02,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-11-07 19:35:02,406 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2024-11-07 19:35:02,406 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 307 flow [2024-11-07 19:35:02,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 19:35:02,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:02,407 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:35:02,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:35:02,607 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 19:35:02,608 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:35:02,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1293148760, now seen corresponding path program 1 times [2024-11-07 19:35:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:02,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400862995] [2024-11-07 19:35:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:02,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:02,723 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 19:35:02,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400862995] [2024-11-07 19:35:02,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400862995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466243386] [2024-11-07 19:35:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:02,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:02,730 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 19:35:02,733 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 19:35:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:02,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:35:02,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:02,867 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 19:35:02,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:02,914 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 19:35:02,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466243386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:02,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:02,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-07 19:35:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491235998] [2024-11-07 19:35:02,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:02,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:35:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:35:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:35:02,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:02,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 307 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 19:35:02,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:02,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:02,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:03,303 INFO L124 PetriNetUnfolderBase]: 2677/3909 cut-off events. [2024-11-07 19:35:03,303 INFO L125 PetriNetUnfolderBase]: For 8890/9310 co-relation queries the response was YES. [2024-11-07 19:35:03,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 3909 events. 2677/3909 cut-off events. For 8890/9310 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18596 event pairs, 1549 based on Foata normal form. 54/3960 useless extension candidates. Maximal degree in co-relation 8743. Up to 2459 conditions per place. [2024-11-07 19:35:03,319 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-11-07 19:35:03,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 767 flow [2024-11-07 19:35:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:35:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:35:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-07 19:35:03,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-07 19:35:03,321 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 307 flow. Second operand 8 states and 156 transitions. [2024-11-07 19:35:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 767 flow [2024-11-07 19:35:03,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 725 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:35:03,328 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 363 flow [2024-11-07 19:35:03,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-11-07 19:35:03,331 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-11-07 19:35:03,331 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 363 flow [2024-11-07 19:35:03,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 19:35:03,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:03,331 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:35:03,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:35:03,532 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 19:35:03,532 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:35:03,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1332811884, now seen corresponding path program 2 times [2024-11-07 19:35:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:03,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727325198] [2024-11-07 19:35:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:03,686 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 19:35:03,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:03,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727325198] [2024-11-07 19:35:03,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727325198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:03,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867550694] [2024-11-07 19:35:03,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:35:03,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:03,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:03,689 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 19:35:03,693 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 19:35:03,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:03,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:03,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:35:03,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:03,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:35:03,965 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 19:35:03,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:04,145 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 19:35:04,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867550694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:04,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:04,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-07 19:35:04,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092531714] [2024-11-07 19:35:04,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:04,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:35:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:35:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:35:04,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:04,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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 19:35:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:05,361 INFO L124 PetriNetUnfolderBase]: 2903/4192 cut-off events. [2024-11-07 19:35:05,362 INFO L125 PetriNetUnfolderBase]: For 10202/10699 co-relation queries the response was YES. [2024-11-07 19:35:05,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 4192 events. 2903/4192 cut-off events. For 10202/10699 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20544 event pairs, 499 based on Foata normal form. 72/4260 useless extension candidates. Maximal degree in co-relation 9881. Up to 828 conditions per place. [2024-11-07 19:35:05,382 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 172 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-11-07 19:35:05,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 195 transitions, 1370 flow [2024-11-07 19:35:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:35:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:35:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-11-07 19:35:05,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-11-07 19:35:05,384 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 363 flow. Second operand 14 states and 290 transitions. [2024-11-07 19:35:05,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 195 transitions, 1370 flow [2024-11-07 19:35:05,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 195 transitions, 1342 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:05,395 INFO L231 Difference]: Finished difference. Result has 86 places, 60 transitions, 415 flow [2024-11-07 19:35:05,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2024-11-07 19:35:05,396 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2024-11-07 19:35:05,396 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 415 flow [2024-11-07 19:35:05,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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 19:35:05,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:05,396 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:35:05,411 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 19:35:05,600 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 19:35:05,600 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-07 19:35:05,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1125410770, now seen corresponding path program 2 times [2024-11-07 19:35:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:05,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807302014] [2024-11-07 19:35:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:05,773 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 19:35:05,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807302014] [2024-11-07 19:35:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807302014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443531463] [2024-11-07 19:35:05,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:35:05,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:05,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:05,777 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 19:35:05,779 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 19:35:05,835 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:05,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:05,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:35:05,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:05,942 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 19:35:05,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:06,026 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 19:35:06,065 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 19:35:06,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443531463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:06,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:06,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-07 19:35:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541941663] [2024-11-07 19:35:06,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:06,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:35:06,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:06,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:35:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:35:06,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:06,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 415 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:35:06,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:06,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:07,344 INFO L124 PetriNetUnfolderBase]: 3482/4995 cut-off events. [2024-11-07 19:35:07,344 INFO L125 PetriNetUnfolderBase]: For 16484/17289 co-relation queries the response was YES. [2024-11-07 19:35:07,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 4995 events. 3482/4995 cut-off events. For 16484/17289 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23288 event pairs, 557 based on Foata normal form. 234/5225 useless extension candidates. Maximal degree in co-relation 13568. Up to 909 conditions per place. [2024-11-07 19:35:07,370 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-11-07 19:35:07,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 188 transitions, 1485 flow [2024-11-07 19:35:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:35:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:35:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-11-07 19:35:07,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-11-07 19:35:07,372 INFO L175 Difference]: Start difference. First operand has 86 places, 60 transitions, 415 flow. Second operand 14 states and 277 transitions. [2024-11-07 19:35:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 188 transitions, 1485 flow [2024-11-07 19:35:07,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1294 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-11-07 19:35:07,386 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 427 flow [2024-11-07 19:35:07,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2024-11-07 19:35:07,387 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2024-11-07 19:35:07,387 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 427 flow [2024-11-07 19:35:07,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:35:07,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:07,387 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 19:35:07,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:07,589 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 19:35:07,590 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 19:35:07,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:07,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1413948225, now seen corresponding path program 1 times [2024-11-07 19:35:07,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:07,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142231453] [2024-11-07 19:35:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:07,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:07,628 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 19:35:07,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:07,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142231453] [2024-11-07 19:35:07,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142231453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:35:07,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:35:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:35:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092891262] [2024-11-07 19:35:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:07,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:35:07,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:35:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:35:07,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-07 19:35:07,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 427 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 19:35:07,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:07,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-07 19:35:07,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:07,882 INFO L124 PetriNetUnfolderBase]: 2982/4507 cut-off events. [2024-11-07 19:35:07,882 INFO L125 PetriNetUnfolderBase]: For 15282/15967 co-relation queries the response was YES. [2024-11-07 19:35:07,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17499 conditions, 4507 events. 2982/4507 cut-off events. For 15282/15967 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22101 event pairs, 744 based on Foata normal form. 29/4515 useless extension candidates. Maximal degree in co-relation 11749. Up to 3550 conditions per place. [2024-11-07 19:35:07,904 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 64 selfloop transitions, 4 changer transitions 8/84 dead transitions. [2024-11-07 19:35:07,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 702 flow [2024-11-07 19:35:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:35:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:35:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-07 19:35:07,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-07 19:35:07,906 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 427 flow. Second operand 3 states and 74 transitions. [2024-11-07 19:35:07,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 702 flow [2024-11-07 19:35:07,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 625 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-07 19:35:07,919 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 343 flow [2024-11-07 19:35:07,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2024-11-07 19:35:07,920 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-11-07 19:35:07,920 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 343 flow [2024-11-07 19:35:07,920 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 19:35:07,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:07,920 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] [2024-11-07 19:35:07,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:35:07,920 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 19:35:07,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1719107638, now seen corresponding path program 1 times [2024-11-07 19:35:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993622671] [2024-11-07 19:35:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:07,989 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 19:35:07,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993622671] [2024-11-07 19:35:07,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993622671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749563204] [2024-11-07 19:35:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:07,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:07,993 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 19:35:07,995 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 19:35:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:08,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:35:08,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:08,109 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 19:35:08,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:08,149 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 19:35:08,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749563204] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:08,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:35:08,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-07 19:35:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391186713] [2024-11-07 19:35:08,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:08,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:35:08,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:35:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:35:08,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:35:08,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 19:35:08,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:08,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:35:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:08,707 INFO L124 PetriNetUnfolderBase]: 4798/6881 cut-off events. [2024-11-07 19:35:08,707 INFO L125 PetriNetUnfolderBase]: For 17135/17730 co-relation queries the response was YES. [2024-11-07 19:35:08,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 6881 events. 4798/6881 cut-off events. For 17135/17730 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 34580 event pairs, 1232 based on Foata normal form. 50/6458 useless extension candidates. Maximal degree in co-relation 18143. Up to 2532 conditions per place. [2024-11-07 19:35:08,732 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 150 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2024-11-07 19:35:08,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 175 transitions, 1394 flow [2024-11-07 19:35:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:35:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:35:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-11-07 19:35:08,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-07 19:35:08,733 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 343 flow. Second operand 9 states and 165 transitions. [2024-11-07 19:35:08,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 175 transitions, 1394 flow [2024-11-07 19:35:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 175 transitions, 1250 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-11-07 19:35:08,756 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 410 flow [2024-11-07 19:35:08,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2024-11-07 19:35:08,756 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-07 19:35:08,756 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 410 flow [2024-11-07 19:35:08,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 19:35:08,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:08,757 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] [2024-11-07 19:35:08,769 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 19:35:08,959 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 19:35:08,959 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 19:35:08,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1758632884, now seen corresponding path program 2 times [2024-11-07 19:35:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:08,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702596631] [2024-11-07 19:35:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:09,033 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 19:35:09,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702596631] [2024-11-07 19:35:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702596631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852149230] [2024-11-07 19:35:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:35:09,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:09,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:09,038 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 19:35:09,041 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 19:35:09,099 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:09,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:09,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:35:09,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:09,143 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 19:35:09,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:09,199 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 19:35:09,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852149230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:09,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:09,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-07 19:35:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676927550] [2024-11-07 19:35:09,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:09,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:35:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:35:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:35:09,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:35:09,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 410 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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 19:35:09,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:09,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:35:09,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:10,140 INFO L124 PetriNetUnfolderBase]: 7451/10707 cut-off events. [2024-11-07 19:35:10,140 INFO L125 PetriNetUnfolderBase]: For 21066/21292 co-relation queries the response was YES. [2024-11-07 19:35:10,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37997 conditions, 10707 events. 7451/10707 cut-off events. For 21066/21292 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 56634 event pairs, 1049 based on Foata normal form. 40/10565 useless extension candidates. Maximal degree in co-relation 27722. Up to 2288 conditions per place. [2024-11-07 19:35:10,197 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 211 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2024-11-07 19:35:10,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 274 transitions, 2127 flow [2024-11-07 19:35:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:35:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:35:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-11-07 19:35:10,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3717532467532468 [2024-11-07 19:35:10,200 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 410 flow. Second operand 14 states and 229 transitions. [2024-11-07 19:35:10,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 274 transitions, 2127 flow [2024-11-07 19:35:10,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 274 transitions, 2124 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:35:10,241 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 893 flow [2024-11-07 19:35:10,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-11-07 19:35:10,242 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-11-07 19:35:10,242 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 893 flow [2024-11-07 19:35:10,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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 19:35:10,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:10,242 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] [2024-11-07 19:35:10,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 19:35:10,442 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 19:35:10,442 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 19:35:10,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash 643348074, now seen corresponding path program 3 times [2024-11-07 19:35:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:10,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190488723] [2024-11-07 19:35:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:10,546 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 19:35:10,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:10,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190488723] [2024-11-07 19:35:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190488723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:10,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354367212] [2024-11-07 19:35:10,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:35:10,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:10,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:10,551 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 19:35:10,554 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 19:35:10,631 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:35:10,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:10,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:35:10,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:10,706 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 19:35:10,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:10,767 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 19:35:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354367212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:10,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-07 19:35:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739307176] [2024-11-07 19:35:10,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:10,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:35:10,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:35:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:35:10,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:35:10,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 893 flow. Second operand has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 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 19:35:10,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:10,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:35:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:12,073 INFO L124 PetriNetUnfolderBase]: 10525/15049 cut-off events. [2024-11-07 19:35:12,073 INFO L125 PetriNetUnfolderBase]: For 48646/49034 co-relation queries the response was YES. [2024-11-07 19:35:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63117 conditions, 15049 events. 10525/15049 cut-off events. For 48646/49034 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 82706 event pairs, 1913 based on Foata normal form. 112/15159 useless extension candidates. Maximal degree in co-relation 56495. Up to 4534 conditions per place. [2024-11-07 19:35:12,186 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 229 selfloop transitions, 104 changer transitions 0/337 dead transitions. [2024-11-07 19:35:12,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 337 transitions, 3046 flow [2024-11-07 19:35:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:35:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:35:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 264 transitions. [2024-11-07 19:35:12,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-07 19:35:12,188 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 893 flow. Second operand 15 states and 264 transitions. [2024-11-07 19:35:12,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 337 transitions, 3046 flow [2024-11-07 19:35:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 337 transitions, 3018 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:12,395 INFO L231 Difference]: Finished difference. Result has 114 places, 165 transitions, 1787 flow [2024-11-07 19:35:12,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1787, PETRI_PLACES=114, PETRI_TRANSITIONS=165} [2024-11-07 19:35:12,395 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 68 predicate places. [2024-11-07 19:35:12,395 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 165 transitions, 1787 flow [2024-11-07 19:35:12,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 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 19:35:12,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:12,396 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] [2024-11-07 19:35:12,408 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 19:35:12,599 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 19:35:12,600 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 19:35:12,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1558054896, now seen corresponding path program 4 times [2024-11-07 19:35:12,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:12,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144245076] [2024-11-07 19:35:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:12,703 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 19:35:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144245076] [2024-11-07 19:35:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144245076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997387503] [2024-11-07 19:35:12,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:35:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:12,706 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 19:35:12,707 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 19:35:12,763 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:35:12,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:12,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:35:12,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:12,852 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 19:35:12,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:12,938 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 19:35:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997387503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:12,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-07 19:35:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472133681] [2024-11-07 19:35:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:12,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:35:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:35:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:35:13,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-07 19:35:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 165 transitions, 1787 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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 19:35:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-07 19:35:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:15,218 INFO L124 PetriNetUnfolderBase]: 13345/18907 cut-off events. [2024-11-07 19:35:15,219 INFO L125 PetriNetUnfolderBase]: For 95643/95643 co-relation queries the response was YES. [2024-11-07 19:35:15,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90791 conditions, 18907 events. 13345/18907 cut-off events. For 95643/95643 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 101649 event pairs, 1267 based on Foata normal form. 42/18591 useless extension candidates. Maximal degree in co-relation 82522. Up to 3126 conditions per place. [2024-11-07 19:35:15,399 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 367 selfloop transitions, 264 changer transitions 0/632 dead transitions. [2024-11-07 19:35:15,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 632 transitions, 6835 flow [2024-11-07 19:35:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-07 19:35:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-07 19:35:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 427 transitions. [2024-11-07 19:35:15,401 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3732517482517482 [2024-11-07 19:35:15,401 INFO L175 Difference]: Start difference. First operand has 114 places, 165 transitions, 1787 flow. Second operand 26 states and 427 transitions. [2024-11-07 19:35:15,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 632 transitions, 6835 flow [2024-11-07 19:35:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 632 transitions, 6563 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-07 19:35:15,921 INFO L231 Difference]: Finished difference. Result has 143 places, 351 transitions, 4292 flow [2024-11-07 19:35:15,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4292, PETRI_PLACES=143, PETRI_TRANSITIONS=351} [2024-11-07 19:35:15,922 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-11-07 19:35:15,922 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 351 transitions, 4292 flow [2024-11-07 19:35:15,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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 19:35:15,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:15,922 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] [2024-11-07 19:35:15,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:16,126 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 19:35:16,127 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 19:35:16,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2075377812, now seen corresponding path program 5 times [2024-11-07 19:35:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:16,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467349587] [2024-11-07 19:35:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:16,233 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 19:35:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467349587] [2024-11-07 19:35:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467349587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263208237] [2024-11-07 19:35:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:35:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:16,235 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 19:35:16,236 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 19:35:16,298 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:16,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:16,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:35:16,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:16,397 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 19:35:16,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:16,513 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 19:35:16,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263208237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:16,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 19:35:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054168232] [2024-11-07 19:35:16,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:16,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:35:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:35:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:35:16,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-07 19:35:16,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 351 transitions, 4292 flow. Second operand has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 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 19:35:16,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:16,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-07 19:35:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:19,219 INFO L124 PetriNetUnfolderBase]: 14993/21184 cut-off events. [2024-11-07 19:35:19,219 INFO L125 PetriNetUnfolderBase]: For 128087/128087 co-relation queries the response was YES. [2024-11-07 19:35:19,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110635 conditions, 21184 events. 14993/21184 cut-off events. For 128087/128087 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 115834 event pairs, 1542 based on Foata normal form. 38/21222 useless extension candidates. Maximal degree in co-relation 107997. Up to 3980 conditions per place. [2024-11-07 19:35:19,495 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 262 selfloop transitions, 512 changer transitions 0/775 dead transitions. [2024-11-07 19:35:19,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 775 transitions, 9357 flow [2024-11-07 19:35:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-07 19:35:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-07 19:35:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 371 transitions. [2024-11-07 19:35:19,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38326446280991733 [2024-11-07 19:35:19,497 INFO L175 Difference]: Start difference. First operand has 143 places, 351 transitions, 4292 flow. Second operand 22 states and 371 transitions. [2024-11-07 19:35:19,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 775 transitions, 9357 flow [2024-11-07 19:35:20,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 775 transitions, 9202 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:20,839 INFO L231 Difference]: Finished difference. Result has 166 places, 607 transitions, 8261 flow [2024-11-07 19:35:20,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8261, PETRI_PLACES=166, PETRI_TRANSITIONS=607} [2024-11-07 19:35:20,840 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 120 predicate places. [2024-11-07 19:35:20,840 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 607 transitions, 8261 flow [2024-11-07 19:35:20,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 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 19:35:20,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:20,840 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] [2024-11-07 19:35:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:21,041 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 19:35:21,041 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 19:35:21,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash 478094482, now seen corresponding path program 1 times [2024-11-07 19:35:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771117732] [2024-11-07 19:35:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:21,129 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 19:35:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:21,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771117732] [2024-11-07 19:35:21,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771117732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:21,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348707216] [2024-11-07 19:35:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:21,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:21,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:21,131 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 19:35:21,133 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 19:35:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:21,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:35:21,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:21,226 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 19:35:21,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:21,252 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 19:35:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348707216] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:21,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:35:21,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-07 19:35:21,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508689208] [2024-11-07 19:35:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:21,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:35:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:35:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:35:21,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:21,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 607 transitions, 8261 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:35:21,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:21,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:21,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:23,936 INFO L124 PetriNetUnfolderBase]: 11194/16296 cut-off events. [2024-11-07 19:35:23,937 INFO L125 PetriNetUnfolderBase]: For 160708/161896 co-relation queries the response was YES. [2024-11-07 19:35:24,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91444 conditions, 16296 events. 11194/16296 cut-off events. For 160708/161896 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 95722 event pairs, 2941 based on Foata normal form. 1222/17258 useless extension candidates. Maximal degree in co-relation 89651. Up to 7739 conditions per place. [2024-11-07 19:35:24,113 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 475 selfloop transitions, 77 changer transitions 0/659 dead transitions. [2024-11-07 19:35:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 659 transitions, 10398 flow [2024-11-07 19:35:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:35:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:35:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-07 19:35:24,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-07 19:35:24,115 INFO L175 Difference]: Start difference. First operand has 166 places, 607 transitions, 8261 flow. Second operand 5 states and 88 transitions. [2024-11-07 19:35:24,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 659 transitions, 10398 flow [2024-11-07 19:35:25,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 659 transitions, 10135 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:25,037 INFO L231 Difference]: Finished difference. Result has 166 places, 538 transitions, 7437 flow [2024-11-07 19:35:25,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7437, PETRI_PLACES=166, PETRI_TRANSITIONS=538} [2024-11-07 19:35:25,038 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 120 predicate places. [2024-11-07 19:35:25,038 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 538 transitions, 7437 flow [2024-11-07 19:35:25,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:35:25,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:25,038 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] [2024-11-07 19:35:25,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:25,239 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 19:35:25,239 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 19:35:25,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 796470976, now seen corresponding path program 6 times [2024-11-07 19:35:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:25,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60782010] [2024-11-07 19:35:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:25,313 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 19:35:25,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60782010] [2024-11-07 19:35:25,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60782010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317880280] [2024-11-07 19:35:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:35:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:25,316 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 19:35:25,317 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 19:35:25,382 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-07 19:35:25,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:25,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:35:25,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:25,443 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 19:35:25,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:25,506 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 19:35:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317880280] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:25,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:35:25,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-07 19:35:25,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742555408] [2024-11-07 19:35:25,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:25,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:35:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:35:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:35:25,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:35:25,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 538 transitions, 7437 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 19:35:25,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:25,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:35:25,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:27,548 INFO L124 PetriNetUnfolderBase]: 10450/14892 cut-off events. [2024-11-07 19:35:27,548 INFO L125 PetriNetUnfolderBase]: For 129569/130155 co-relation queries the response was YES. [2024-11-07 19:35:27,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84401 conditions, 14892 events. 10450/14892 cut-off events. For 129569/130155 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82522 event pairs, 1045 based on Foata normal form. 238/15118 useless extension candidates. Maximal degree in co-relation 82983. Up to 4724 conditions per place. [2024-11-07 19:35:27,691 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 356 selfloop transitions, 240 changer transitions 0/601 dead transitions. [2024-11-07 19:35:27,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 601 transitions, 9040 flow [2024-11-07 19:35:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:35:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:35:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-11-07 19:35:27,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-07 19:35:27,692 INFO L175 Difference]: Start difference. First operand has 166 places, 538 transitions, 7437 flow. Second operand 8 states and 146 transitions. [2024-11-07 19:35:27,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 601 transitions, 9040 flow [2024-11-07 19:35:28,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 601 transitions, 8930 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:28,650 INFO L231 Difference]: Finished difference. Result has 170 places, 536 transitions, 7879 flow [2024-11-07 19:35:28,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7263, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7879, PETRI_PLACES=170, PETRI_TRANSITIONS=536} [2024-11-07 19:35:28,651 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 124 predicate places. [2024-11-07 19:35:28,651 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 536 transitions, 7879 flow [2024-11-07 19:35:28,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 19:35:28,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:28,652 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, 1, 1] [2024-11-07 19:35:28,665 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 19:35:28,852 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 19:35:28,853 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 19:35:28,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 55025329, now seen corresponding path program 1 times [2024-11-07 19:35:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130735809] [2024-11-07 19:35:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:29,433 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 19:35:29,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130735809] [2024-11-07 19:35:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130735809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:29,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527258005] [2024-11-07 19:35:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:29,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:29,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:29,437 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 19:35:29,438 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 19:35:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:29,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-07 19:35:29,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:29,553 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 19:35:29,878 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 19:35:29,889 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 19:35:29,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:30,270 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 33 treesize of output 29 [2024-11-07 19:35:30,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:35:30,293 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 70 treesize of output 62 [2024-11-07 19:35:30,391 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 19:35:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527258005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-07 19:35:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938393187] [2024-11-07 19:35:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:30,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:35:30,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:35:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:35:30,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-07 19:35:30,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 536 transitions, 7879 flow. Second operand has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 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 19:35:30,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:30,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-07 19:35:30,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:33,600 INFO L124 PetriNetUnfolderBase]: 10599/15413 cut-off events. [2024-11-07 19:35:33,600 INFO L125 PetriNetUnfolderBase]: For 162080/162881 co-relation queries the response was YES. [2024-11-07 19:35:33,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90845 conditions, 15413 events. 10599/15413 cut-off events. For 162080/162881 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 89915 event pairs, 2003 based on Foata normal form. 306/15584 useless extension candidates. Maximal degree in co-relation 88935. Up to 12485 conditions per place. [2024-11-07 19:35:33,786 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 852 selfloop transitions, 148 changer transitions 1/1078 dead transitions. [2024-11-07 19:35:33,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1078 transitions, 17036 flow [2024-11-07 19:35:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-07 19:35:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-07 19:35:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 329 transitions. [2024-11-07 19:35:33,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4154040404040404 [2024-11-07 19:35:33,788 INFO L175 Difference]: Start difference. First operand has 170 places, 536 transitions, 7879 flow. Second operand 18 states and 329 transitions. [2024-11-07 19:35:33,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 1078 transitions, 17036 flow [2024-11-07 19:35:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1078 transitions, 16813 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:34,951 INFO L231 Difference]: Finished difference. Result has 189 places, 689 transitions, 10278 flow [2024-11-07 19:35:34,952 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10278, PETRI_PLACES=189, PETRI_TRANSITIONS=689} [2024-11-07 19:35:34,952 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 143 predicate places. [2024-11-07 19:35:34,952 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 689 transitions, 10278 flow [2024-11-07 19:35:34,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.36) internal successors, (284), 25 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 19:35:34,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:34,953 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, 1, 1] [2024-11-07 19:35:34,966 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 19:35:35,156 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 19:35:35,157 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 19:35:35,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1261975929, now seen corresponding path program 2 times [2024-11-07 19:35:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:35,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983659873] [2024-11-07 19:35:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:35,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:35,595 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 19:35:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983659873] [2024-11-07 19:35:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983659873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169452334] [2024-11-07 19:35:35,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:35:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:35,598 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 19:35:35,601 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 19:35:35,664 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:35,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:35,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-07 19:35:35,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:35,695 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 19:35:35,886 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 19:35:35,890 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 19:35:35,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:36,034 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 19:35:36,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169452334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:36,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-11-07 19:35:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783578496] [2024-11-07 19:35:36,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:36,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:35:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:35:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:35:36,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:35:36,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 689 transitions, 10278 flow. Second operand has 25 states, 25 states have (on average 10.68) internal successors, (267), 25 states have internal predecessors, (267), 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 19:35:36,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:36,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:35:36,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:40,477 INFO L124 PetriNetUnfolderBase]: 14305/20593 cut-off events. [2024-11-07 19:35:40,477 INFO L125 PetriNetUnfolderBase]: For 191280/191903 co-relation queries the response was YES. [2024-11-07 19:35:40,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121882 conditions, 20593 events. 14305/20593 cut-off events. For 191280/191903 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 121504 event pairs, 2079 based on Foata normal form. 190/20776 useless extension candidates. Maximal degree in co-relation 119519. Up to 15683 conditions per place. [2024-11-07 19:35:40,785 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 1029 selfloop transitions, 289 changer transitions 1/1324 dead transitions. [2024-11-07 19:35:40,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1324 transitions, 20865 flow [2024-11-07 19:35:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-07 19:35:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-07 19:35:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 486 transitions. [2024-11-07 19:35:40,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3563049853372434 [2024-11-07 19:35:40,787 INFO L175 Difference]: Start difference. First operand has 189 places, 689 transitions, 10278 flow. Second operand 31 states and 486 transitions. [2024-11-07 19:35:40,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1324 transitions, 20865 flow [2024-11-07 19:35:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1324 transitions, 20702 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-11-07 19:35:42,789 INFO L231 Difference]: Finished difference. Result has 231 places, 900 transitions, 14184 flow [2024-11-07 19:35:42,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10214, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14184, PETRI_PLACES=231, PETRI_TRANSITIONS=900} [2024-11-07 19:35:42,790 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 185 predicate places. [2024-11-07 19:35:42,790 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 900 transitions, 14184 flow [2024-11-07 19:35:42,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.68) internal successors, (267), 25 states have internal predecessors, (267), 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 19:35:42,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:42,791 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, 1, 1] [2024-11-07 19:35:42,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-07 19:35:42,991 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 19:35:42,991 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 19:35:42,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1972372202, now seen corresponding path program 1 times [2024-11-07 19:35:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:42,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537396418] [2024-11-07 19:35:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:42,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:43,214 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 19:35:43,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:43,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537396418] [2024-11-07 19:35:43,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537396418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:43,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397277571] [2024-11-07 19:35:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:43,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:43,219 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 19:35:43,222 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 19:35:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:43,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:35:43,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:43,395 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 19:35:43,405 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 19:35:43,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:43,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:35:43,453 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 19 treesize of output 16 [2024-11-07 19:35:43,488 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 19:35:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397277571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:43,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 15 [2024-11-07 19:35:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041820940] [2024-11-07 19:35:43,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:35:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:35:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:35:43,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-07 19:35:43,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 900 transitions, 14184 flow. Second operand has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 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 19:35:43,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:43,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-07 19:35:43,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:47,757 INFO L124 PetriNetUnfolderBase]: 14637/21758 cut-off events. [2024-11-07 19:35:47,758 INFO L125 PetriNetUnfolderBase]: For 257278/258711 co-relation queries the response was YES. [2024-11-07 19:35:48,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142740 conditions, 21758 events. 14637/21758 cut-off events. For 257278/258711 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 138016 event pairs, 1264 based on Foata normal form. 524/22128 useless extension candidates. Maximal degree in co-relation 140790. Up to 15383 conditions per place. [2024-11-07 19:35:48,098 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 884 selfloop transitions, 265 changer transitions 38/1436 dead transitions. [2024-11-07 19:35:48,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1436 transitions, 24385 flow [2024-11-07 19:35:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 19:35:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-07 19:35:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-11-07 19:35:48,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4793388429752066 [2024-11-07 19:35:48,099 INFO L175 Difference]: Start difference. First operand has 231 places, 900 transitions, 14184 flow. Second operand 11 states and 232 transitions. [2024-11-07 19:35:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1436 transitions, 24385 flow [2024-11-07 19:35:51,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1436 transitions, 24248 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-11-07 19:35:51,193 INFO L231 Difference]: Finished difference. Result has 243 places, 1029 transitions, 16801 flow [2024-11-07 19:35:51,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14073, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16801, PETRI_PLACES=243, PETRI_TRANSITIONS=1029} [2024-11-07 19:35:51,194 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 197 predicate places. [2024-11-07 19:35:51,194 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 1029 transitions, 16801 flow [2024-11-07 19:35:51,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 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 19:35:51,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:51,195 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, 1, 1] [2024-11-07 19:35:51,210 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 19:35:51,395 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 19:35:51,396 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 19:35:51,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1603374764, now seen corresponding path program 2 times [2024-11-07 19:35:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785463590] [2024-11-07 19:35:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:51,678 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 19:35:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:51,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785463590] [2024-11-07 19:35:51,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785463590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:51,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479910631] [2024-11-07 19:35:51,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:35:51,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:51,681 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 19:35:51,683 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 19:35:51,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:35:51,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:35:51,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-07 19:35:51,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:51,908 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 19:35:51,916 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 19:35:51,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:51,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:35:51,950 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 23 treesize of output 16 [2024-11-07 19:35:51,998 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 19:35:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479910631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:51,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 16 [2024-11-07 19:35:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025108897] [2024-11-07 19:35:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:51,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:35:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:35:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:35:52,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-07 19:35:52,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 1029 transitions, 16801 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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 19:35:52,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:52,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-07 19:35:52,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:57,351 INFO L124 PetriNetUnfolderBase]: 16788/24962 cut-off events. [2024-11-07 19:35:57,351 INFO L125 PetriNetUnfolderBase]: For 338018/339874 co-relation queries the response was YES. [2024-11-07 19:35:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173583 conditions, 24962 events. 16788/24962 cut-off events. For 338018/339874 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 163084 event pairs, 1696 based on Foata normal form. 676/25399 useless extension candidates. Maximal degree in co-relation 171496. Up to 19328 conditions per place. [2024-11-07 19:35:57,856 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 905 selfloop transitions, 218 changer transitions 22/1394 dead transitions. [2024-11-07 19:35:57,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1394 transitions, 24534 flow [2024-11-07 19:35:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:35:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:35:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-11-07 19:35:57,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-11-07 19:35:57,857 INFO L175 Difference]: Start difference. First operand has 243 places, 1029 transitions, 16801 flow. Second operand 9 states and 185 transitions. [2024-11-07 19:35:57,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1394 transitions, 24534 flow [2024-11-07 19:36:02,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1394 transitions, 24306 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:02,181 INFO L231 Difference]: Finished difference. Result has 252 places, 1145 transitions, 19208 flow [2024-11-07 19:36:02,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16587, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19208, PETRI_PLACES=252, PETRI_TRANSITIONS=1145} [2024-11-07 19:36:02,183 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 206 predicate places. [2024-11-07 19:36:02,183 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 1145 transitions, 19208 flow [2024-11-07 19:36:02,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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 19:36:02,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:02,184 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, 1, 1] [2024-11-07 19:36:02,199 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 19:36:02,387 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 19:36:02,388 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 19:36:02,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1122379399, now seen corresponding path program 3 times [2024-11-07 19:36:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:02,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490341459] [2024-11-07 19:36:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:02,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:02,681 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 19:36:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490341459] [2024-11-07 19:36:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490341459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597129119] [2024-11-07 19:36:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:36:02,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:02,685 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 19:36:02,688 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 19:36:02,756 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 19:36:02,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:02,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:36:02,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:02,785 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 19:36:02,975 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 19:36:02,983 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 19:36:02,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:03,162 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 19:36:03,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597129119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:03,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:03,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2024-11-07 19:36:03,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702372321] [2024-11-07 19:36:03,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:03,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:36:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:36:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:36:03,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-07 19:36:03,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 1145 transitions, 19208 flow. Second operand has 24 states, 24 states have (on average 10.458333333333334) internal successors, (251), 24 states have internal predecessors, (251), 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 19:36:03,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:03,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-07 19:36:03,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:12,204 INFO L124 PetriNetUnfolderBase]: 23610/34442 cut-off events. [2024-11-07 19:36:12,205 INFO L125 PetriNetUnfolderBase]: For 437780/438861 co-relation queries the response was YES. [2024-11-07 19:36:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241087 conditions, 34442 events. 23610/34442 cut-off events. For 437780/438861 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 224721 event pairs, 1906 based on Foata normal form. 421/34856 useless extension candidates. Maximal degree in co-relation 237427. Up to 26679 conditions per place.