./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --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/goblint-regression/09-regions_19-nested_nr.i', '-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', 'e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a'] 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/goblint-regression/09-regions_19-nested_nr.i -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 e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:23:12,887 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:23:12,989 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:23:12,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:23:12,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:23:13,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:23:13,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:23:13,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:23:13,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:23:13,029 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:23:13,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:23:13,030 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:23:13,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:23:13,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:23:13,031 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:23:13,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:23:13,031 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:23:13,032 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:23:13,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:23:13,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:23:13,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:23:13,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:23:13,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:23:13,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:23:13,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:23:13,034 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 -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2024-11-07 19:23:13,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:23:13,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:23:13,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:23:13,335 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:23:13,335 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:23:13,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-07 19:23:14,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:23:14,918 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:23:14,919 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-07 19:23:14,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a6184356c/a1cf74965e6d4ebfa02d594abad7d43a/FLAG1b4016cdf [2024-11-07 19:23:15,198 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a6184356c/a1cf74965e6d4ebfa02d594abad7d43a [2024-11-07 19:23:15,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:23:15,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:23:15,202 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:23:15,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:23:15,206 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:23:15,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:15" (1/1) ... [2024-11-07 19:23:15,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496d4ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:15, skipping insertion in model container [2024-11-07 19:23:15,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:15" (1/1) ... [2024-11-07 19:23:15,252 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:23:15,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:23:15,809 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:23:15,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:23:16,010 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:23:16,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16 WrapperNode [2024-11-07 19:23:16,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:23:16,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:23:16,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:23:16,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:23:16,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,086 INFO L138 Inliner]: procedures = 372, calls = 87, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 186 [2024-11-07 19:23:16,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:23:16,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:23:16,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:23:16,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:23:16,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,104 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,138 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [64, 14]. 82 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60, 0]. The 11 writes are split as follows [1, 10]. [2024-11-07 19:23:16,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,156 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:23:16,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:23:16,175 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:23:16,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:23:16,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (1/1) ... [2024-11-07 19:23:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:23:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:16,216 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 19:23:16,219 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 19:23:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-07 19:23:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-07 19:23:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-07 19:23:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 19:23:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:23:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:23:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-07 19:23:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-07 19:23:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-07 19:23:16,244 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-07 19:23:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:23:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:23:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:23:16,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:23:16,246 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 19:23:16,411 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:23:16,413 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:23:16,859 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:23:16,860 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:23:17,314 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:23:17,316 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-07 19:23:17,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:17 BoogieIcfgContainer [2024-11-07 19:23:17,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:23:17,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:23:17,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:23:17,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:23:17,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:23:15" (1/3) ... [2024-11-07 19:23:17,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f89ea3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:17, skipping insertion in model container [2024-11-07 19:23:17,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:16" (2/3) ... [2024-11-07 19:23:17,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f89ea3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:17, skipping insertion in model container [2024-11-07 19:23:17,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:17" (3/3) ... [2024-11-07 19:23:17,326 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2024-11-07 19:23:17,339 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:23:17,339 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-07 19:23:17,340 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:23:17,400 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 19:23:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 150 flow [2024-11-07 19:23:17,476 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2024-11-07 19:23:17,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:23:17,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-07 19:23:17,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 150 flow [2024-11-07 19:23:17,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 147 flow [2024-11-07 19:23:17,497 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:23:17,512 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;@23fd7a91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:23:17,512 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-07 19:23:17,519 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:23:17,519 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-07 19:23:17,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:23:17,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:17,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:23:17,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:17,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash 16281165, now seen corresponding path program 1 times [2024-11-07 19:23:17,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:17,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386319024] [2024-11-07 19:23:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:17,829 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 19:23:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386319024] [2024-11-07 19:23:17,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386319024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:17,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:17,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:23:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931957348] [2024-11-07 19:23:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:17,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:23:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:17,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:23:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:23:17,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-07 19:23:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 19:23:17,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:17,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-07 19:23:17,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:18,038 INFO L124 PetriNetUnfolderBase]: 65/268 cut-off events. [2024-11-07 19:23:18,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:23:18,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 268 events. 65/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1343 event pairs, 63 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2024-11-07 19:23:18,044 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-07 19:23:18,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 207 flow [2024-11-07 19:23:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:23:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:23:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-07 19:23:18,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2024-11-07 19:23:18,063 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 147 flow. Second operand 3 states and 165 transitions. [2024-11-07 19:23:18,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 207 flow [2024-11-07 19:23:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:23:18,074 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2024-11-07 19:23:18,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-11-07 19:23:18,080 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2024-11-07 19:23:18,081 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2024-11-07 19:23:18,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 19:23:18,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:18,082 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:23:18,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:23:18,083 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:18,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 504674819, now seen corresponding path program 1 times [2024-11-07 19:23:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342491164] [2024-11-07 19:23:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:18,253 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 19:23:18,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342491164] [2024-11-07 19:23:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342491164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531538016] [2024-11-07 19:23:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:18,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:18,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:18,257 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 19:23:18,259 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 19:23:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:18,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:23:18,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:18,421 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 19:23:18,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:23:18,443 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 19:23:18,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531538016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:23:18,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:23:18,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-07 19:23:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041541706] [2024-11-07 19:23:18,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:23:18,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:23:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:23:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:23:18,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-07 19:23:18,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:23:18,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:18,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-07 19:23:18,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:18,625 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2024-11-07 19:23:18,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:23:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 271 events. 65/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1338 event pairs, 63 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 432. Up to 155 conditions per place. [2024-11-07 19:23:18,629 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-07 19:23:18,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 234 flow [2024-11-07 19:23:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:23:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:23:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2024-11-07 19:23:18,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6963470319634704 [2024-11-07 19:23:18,635 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 6 states and 305 transitions. [2024-11-07 19:23:18,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 234 flow [2024-11-07 19:23:18,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:23:18,637 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2024-11-07 19:23:18,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-11-07 19:23:18,638 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-11-07 19:23:18,639 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2024-11-07 19:23:18,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:23:18,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:18,640 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:23:18,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-07 19:23:18,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:18,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:18,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1953977395, now seen corresponding path program 2 times [2024-11-07 19:23:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345474189] [2024-11-07 19:23:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-07 19:23:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345474189] [2024-11-07 19:23:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345474189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:23:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557428716] [2024-11-07 19:23:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:18,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:23:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:23:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:23:19,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-11-07 19:23:19,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 19:23:19,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:19,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-11-07 19:23:19,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:19,167 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-11-07 19:23:19,168 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:23:19,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 267 events. 65/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1307 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 421. Up to 157 conditions per place. [2024-11-07 19:23:19,170 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 30 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-11-07 19:23:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 250 flow [2024-11-07 19:23:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:23:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:23:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-11-07 19:23:19,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2024-11-07 19:23:19,172 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 3 states and 151 transitions. [2024-11-07 19:23:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 250 flow [2024-11-07 19:23:19,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:23:19,174 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 176 flow [2024-11-07 19:23:19,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-11-07 19:23:19,175 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2024-11-07 19:23:19,176 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 176 flow [2024-11-07 19:23:19,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 19:23:19,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:19,176 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:23:19,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:23:19,176 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:19,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1953977394, now seen corresponding path program 1 times [2024-11-07 19:23:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338088621] [2024-11-07 19:23:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:23:19,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338088621] [2024-11-07 19:23:19,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338088621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304582038] [2024-11-07 19:23:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:19,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:23:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:23:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:19,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:23:19,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:23:19,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:23:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:23:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304582038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:23:19,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:23:19,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:23:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369970812] [2024-11-07 19:23:19,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:23:19,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:23:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:23:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:23:19,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-07 19:23:19,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 176 flow. Second operand has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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 19:23:19,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:19,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-07 19:23:19,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:19,684 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-11-07 19:23:19,685 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-07 19:23:19,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 273 events. 65/273 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1335 event pairs, 63 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 431. Up to 155 conditions per place. [2024-11-07 19:23:19,687 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-07 19:23:19,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 288 flow [2024-11-07 19:23:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:23:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:23:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 584 transitions. [2024-11-07 19:23:19,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-07 19:23:19,690 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 176 flow. Second operand 12 states and 584 transitions. [2024-11-07 19:23:19,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 288 flow [2024-11-07 19:23:19,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:23:19,698 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2024-11-07 19:23:19,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2024-11-07 19:23:19,699 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2024-11-07 19:23:19,699 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2024-11-07 19:23:19,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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 19:23:19,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:19,699 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-07 19:23:19,718 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 19:23:19,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:19,900 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:19,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2042945550, now seen corresponding path program 2 times [2024-11-07 19:23:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932214574] [2024-11-07 19:23:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:20,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:20,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932214574] [2024-11-07 19:23:20,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932214574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:20,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:20,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:23:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350744817] [2024-11-07 19:23:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:20,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:23:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:23:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:23:20,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2024-11-07 19:23:20,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 19:23:20,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:20,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2024-11-07 19:23:20,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:20,222 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-11-07 19:23:20,223 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-07 19:23:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 269 events. 65/269 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1309 event pairs, 63 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 421. Up to 163 conditions per place. [2024-11-07 19:23:20,226 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-11-07 19:23:20,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 320 flow [2024-11-07 19:23:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:23:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:23:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-07 19:23:20,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2024-11-07 19:23:20,227 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 3 states and 155 transitions. [2024-11-07 19:23:20,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 320 flow [2024-11-07 19:23:20,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 272 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-07 19:23:20,231 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 204 flow [2024-11-07 19:23:20,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-07 19:23:20,233 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-07 19:23:20,234 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 204 flow [2024-11-07 19:23:20,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 19:23:20,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:20,235 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:20,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:23:20,235 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:20,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash 470633516, now seen corresponding path program 1 times [2024-11-07 19:23:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797567106] [2024-11-07 19:23:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:20,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797567106] [2024-11-07 19:23:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797567106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:20,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:20,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:23:20,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278725081] [2024-11-07 19:23:20,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:20,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:23:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:23:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-07 19:23:20,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 73 [2024-11-07 19:23:20,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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 19:23:20,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:20,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 73 [2024-11-07 19:23:20,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:20,970 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2024-11-07 19:23:20,970 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-07 19:23:20,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 277 events. 65/277 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1237 event pairs, 63 based on Foata normal form. 11/235 useless extension candidates. Maximal degree in co-relation 446. Up to 166 conditions per place. [2024-11-07 19:23:20,972 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 40 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-07 19:23:20,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 312 flow [2024-11-07 19:23:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:23:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:23:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-11-07 19:23:20,974 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-11-07 19:23:20,974 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 204 flow. Second operand 5 states and 221 transitions. [2024-11-07 19:23:20,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 312 flow [2024-11-07 19:23:20,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:23:20,979 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 238 flow [2024-11-07 19:23:20,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-11-07 19:23:20,980 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-07 19:23:20,980 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 238 flow [2024-11-07 19:23:20,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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 19:23:20,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:20,981 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:20,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:23:20,981 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:20,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2146860356, now seen corresponding path program 1 times [2024-11-07 19:23:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337409705] [2024-11-07 19:23:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:21,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:21,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337409705] [2024-11-07 19:23:21,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337409705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:21,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:21,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 19:23:21,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532721915] [2024-11-07 19:23:21,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:21,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:23:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:23:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:23:21,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 73 [2024-11-07 19:23:21,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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 19:23:21,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:21,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 73 [2024-11-07 19:23:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:21,878 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-11-07 19:23:21,878 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-07 19:23:21,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 273 events. 65/273 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1214 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 457. Up to 160 conditions per place. [2024-11-07 19:23:21,880 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 35 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-11-07 19:23:21,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 326 flow [2024-11-07 19:23:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:23:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:23:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2024-11-07 19:23:21,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5577299412915852 [2024-11-07 19:23:21,883 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 238 flow. Second operand 7 states and 285 transitions. [2024-11-07 19:23:21,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 326 flow [2024-11-07 19:23:21,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:23:21,886 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 252 flow [2024-11-07 19:23:21,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-11-07 19:23:21,889 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2024-11-07 19:23:21,889 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 252 flow [2024-11-07 19:23:21,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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 19:23:21,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:21,889 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:21,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:23:21,889 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:21,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2146860357, now seen corresponding path program 1 times [2024-11-07 19:23:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885442878] [2024-11-07 19:23:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:22,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885442878] [2024-11-07 19:23:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885442878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:22,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 19:23:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963967916] [2024-11-07 19:23:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:22,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:23:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:23:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:23:22,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2024-11-07 19:23:22,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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 19:23:22,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:22,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2024-11-07 19:23:22,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:22,925 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-11-07 19:23:22,925 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-07 19:23:22,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 269 events. 65/269 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1192 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 462. Up to 160 conditions per place. [2024-11-07 19:23:22,927 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-11-07 19:23:22,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 71 transitions, 338 flow [2024-11-07 19:23:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:23:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:23:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-07 19:23:22,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2024-11-07 19:23:22,930 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 252 flow. Second operand 7 states and 263 transitions. [2024-11-07 19:23:22,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 71 transitions, 338 flow [2024-11-07 19:23:22,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:23:22,935 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 248 flow [2024-11-07 19:23:22,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2024-11-07 19:23:22,935 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-07 19:23:22,937 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 248 flow [2024-11-07 19:23:22,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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 19:23:22,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:22,938 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:22,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:23:22,938 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:22,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1548519103, now seen corresponding path program 1 times [2024-11-07 19:23:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372172238] [2024-11-07 19:23:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:22,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372172238] [2024-11-07 19:23:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372172238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:23,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:23,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:23:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729478575] [2024-11-07 19:23:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:23,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:23:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:23:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:23:23,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-11-07 19:23:23,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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 19:23:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-11-07 19:23:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:23,372 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-11-07 19:23:23,373 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-07 19:23:23,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 267 events. 65/267 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1170 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 460. Up to 162 conditions per place. [2024-11-07 19:23:23,375 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-11-07 19:23:23,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 336 flow [2024-11-07 19:23:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:23:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:23:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-11-07 19:23:23,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-11-07 19:23:23,376 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 248 flow. Second operand 5 states and 221 transitions. [2024-11-07 19:23:23,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 336 flow [2024-11-07 19:23:23,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:23:23,380 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 246 flow [2024-11-07 19:23:23,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-11-07 19:23:23,380 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2024-11-07 19:23:23,380 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 246 flow [2024-11-07 19:23:23,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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 19:23:23,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:23,381 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:23,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:23:23,381 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:23,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:23,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1548519104, now seen corresponding path program 1 times [2024-11-07 19:23:23,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:23,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526431722] [2024-11-07 19:23:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:23,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526431722] [2024-11-07 19:23:23,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526431722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:23,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:23:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196908943] [2024-11-07 19:23:23,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:23,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:23:23,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:23:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:23:23,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2024-11-07 19:23:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 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 19:23:23,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:23,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2024-11-07 19:23:23,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:23,889 INFO L124 PetriNetUnfolderBase]: 65/265 cut-off events. [2024-11-07 19:23:23,889 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-07 19:23:23,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 265 events. 65/265 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1158 event pairs, 63 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 454. Up to 162 conditions per place. [2024-11-07 19:23:23,891 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 32 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-11-07 19:23:23,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 330 flow [2024-11-07 19:23:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:23:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:23:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-11-07 19:23:23,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6821917808219178 [2024-11-07 19:23:23,893 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 246 flow. Second operand 5 states and 249 transitions. [2024-11-07 19:23:23,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 330 flow [2024-11-07 19:23:23,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:23:23,897 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 244 flow [2024-11-07 19:23:23,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-11-07 19:23:23,898 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-07 19:23:23,898 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 244 flow [2024-11-07 19:23:23,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 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 19:23:23,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:23,899 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:23,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:23:23,900 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:23,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1037591280, now seen corresponding path program 1 times [2024-11-07 19:23:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:23,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304234965] [2024-11-07 19:23:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:23,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:24,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:24,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304234965] [2024-11-07 19:23:24,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304234965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:24,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779445741] [2024-11-07 19:23:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:24,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:24,366 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 19:23:24,367 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 19:23:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:24,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-07 19:23:24,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:24,739 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:23:24,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:23:24,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-07 19:23:24,818 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:23:24,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:23:24,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 19:23:24,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-07 19:23:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:23:24,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-07 19:23:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:25,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:23:25,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:23:25,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-07 19:23:25,310 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:23:25,311 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 13 treesize of output 12 [2024-11-07 19:23:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779445741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:23:25,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:23:25,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 20 [2024-11-07 19:23:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111119338] [2024-11-07 19:23:25,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:23:25,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:23:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:23:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:23:28,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-11-07 19:23:28,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 244 flow. Second operand has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 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 19:23:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-11-07 19:23:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:28,441 INFO L124 PetriNetUnfolderBase]: 75/305 cut-off events. [2024-11-07 19:23:28,441 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-07 19:23:28,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 305 events. 75/305 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1349 event pairs, 72 based on Foata normal form. 5/262 useless extension candidates. Maximal degree in co-relation 534. Up to 176 conditions per place. [2024-11-07 19:23:28,443 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 43 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-11-07 19:23:28,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 398 flow [2024-11-07 19:23:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 19:23:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-07 19:23:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 424 transitions. [2024-11-07 19:23:28,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5280199252801993 [2024-11-07 19:23:28,447 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 244 flow. Second operand 11 states and 424 transitions. [2024-11-07 19:23:28,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 398 flow [2024-11-07 19:23:28,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:23:28,450 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 255 flow [2024-11-07 19:23:28,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=255, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2024-11-07 19:23:28,451 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2024-11-07 19:23:28,452 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 255 flow [2024-11-07 19:23:28,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.77272727272727) internal successors, (787), 22 states have internal predecessors, (787), 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 19:23:28,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:28,453 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:28,470 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 19:23:28,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:28,657 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:28,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1970683289, now seen corresponding path program 1 times [2024-11-07 19:23:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643091450] [2024-11-07 19:23:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643091450] [2024-11-07 19:23:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643091450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250173015] [2024-11-07 19:23:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:28,843 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 19:23:28,845 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 19:23:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:29,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 19:23:29,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:29,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:23:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250173015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:23:29,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:23:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-07 19:23:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709207155] [2024-11-07 19:23:29,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:23:29,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:23:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:23:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:23:29,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-07 19:23:29,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 70 transitions, 255 flow. Second operand has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 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 19:23:29,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:29,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-07 19:23:29,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:29,332 INFO L124 PetriNetUnfolderBase]: 65/304 cut-off events. [2024-11-07 19:23:29,332 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-07 19:23:29,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 304 events. 65/304 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1093 event pairs, 63 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 552. Up to 158 conditions per place. [2024-11-07 19:23:29,334 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 66 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-11-07 19:23:29,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 513 flow [2024-11-07 19:23:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:23:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:23:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 428 transitions. [2024-11-07 19:23:29,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7328767123287672 [2024-11-07 19:23:29,337 INFO L175 Difference]: Start difference. First operand has 89 places, 70 transitions, 255 flow. Second operand 8 states and 428 transitions. [2024-11-07 19:23:29,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 513 flow [2024-11-07 19:23:29,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 98 transitions, 489 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-07 19:23:29,341 INFO L231 Difference]: Finished difference. Result has 96 places, 73 transitions, 291 flow [2024-11-07 19:23:29,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=291, PETRI_PLACES=96, PETRI_TRANSITIONS=73} [2024-11-07 19:23:29,342 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2024-11-07 19:23:29,343 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 73 transitions, 291 flow [2024-11-07 19:23:29,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 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 19:23:29,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:29,343 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:29,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:23:29,543 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,SelfDestructingSolverStorable11 [2024-11-07 19:23:29,544 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:29,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash -444093449, now seen corresponding path program 2 times [2024-11-07 19:23:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:29,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574916152] [2024-11-07 19:23:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:29,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574916152] [2024-11-07 19:23:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574916152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420351734] [2024-11-07 19:23:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:23:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:30,006 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 19:23:30,026 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 19:23:30,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:23:30,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:23:30,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:23:30,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:30,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:23:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420351734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:23:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:23:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-07 19:23:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870845118] [2024-11-07 19:23:30,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:23:30,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:23:30,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:23:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:23:30,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-07 19:23:30,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 73 transitions, 291 flow. Second operand has 13 states, 13 states have (on average 51.15384615384615) internal successors, (665), 13 states have internal predecessors, (665), 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 19:23:30,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:30,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-07 19:23:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:30,868 INFO L124 PetriNetUnfolderBase]: 65/344 cut-off events. [2024-11-07 19:23:30,868 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2024-11-07 19:23:30,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 344 events. 65/344 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1102 event pairs, 63 based on Foata normal form. 4/304 useless extension candidates. Maximal degree in co-relation 672. Up to 158 conditions per place. [2024-11-07 19:23:30,871 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 90 selfloop transitions, 12 changer transitions 0/126 dead transitions. [2024-11-07 19:23:30,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 126 transitions, 727 flow [2024-11-07 19:23:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:23:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:23:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2024-11-07 19:23:30,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2024-11-07 19:23:30,874 INFO L175 Difference]: Start difference. First operand has 96 places, 73 transitions, 291 flow. Second operand 12 states and 636 transitions. [2024-11-07 19:23:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 126 transitions, 727 flow [2024-11-07 19:23:30,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 723 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:23:30,877 INFO L231 Difference]: Finished difference. Result has 110 places, 78 transitions, 386 flow [2024-11-07 19:23:30,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=386, PETRI_PLACES=110, PETRI_TRANSITIONS=78} [2024-11-07 19:23:30,878 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2024-11-07 19:23:30,878 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 78 transitions, 386 flow [2024-11-07 19:23:30,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.15384615384615) internal successors, (665), 13 states have internal predecessors, (665), 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 19:23:30,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:30,879 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:30,898 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 19:23:31,079 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,SelfDestructingSolverStorable12 [2024-11-07 19:23:31,080 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:31,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1597979257, now seen corresponding path program 3 times [2024-11-07 19:23:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517869963] [2024-11-07 19:23:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 336 proven. 124 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:23:32,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:32,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517869963] [2024-11-07 19:23:32,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517869963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:23:32,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280588780] [2024-11-07 19:23:32,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:23:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:23:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:23:32,119 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 19:23:32,121 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 19:23:32,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:23:32,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:23:32,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:23:32,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:23:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2024-11-07 19:23:33,063 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:23:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280588780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:33,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:23:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2024-11-07 19:23:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215506743] [2024-11-07 19:23:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:33,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:23:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:23:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:23:33,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2024-11-07 19:23:33,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 78 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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 19:23:33,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2024-11-07 19:23:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:33,364 INFO L124 PetriNetUnfolderBase]: 71/384 cut-off events. [2024-11-07 19:23:33,364 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2024-11-07 19:23:33,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 384 events. 71/384 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1441 event pairs, 18 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 749. Up to 126 conditions per place. [2024-11-07 19:23:33,369 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 46 selfloop transitions, 22 changer transitions 3/94 dead transitions. [2024-11-07 19:23:33,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 94 transitions, 560 flow [2024-11-07 19:23:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:23:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:23:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 355 transitions. [2024-11-07 19:23:33,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6947162426614482 [2024-11-07 19:23:33,371 INFO L175 Difference]: Start difference. First operand has 110 places, 78 transitions, 386 flow. Second operand 7 states and 355 transitions. [2024-11-07 19:23:33,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 94 transitions, 560 flow [2024-11-07 19:23:33,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 94 transitions, 550 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:23:33,378 INFO L231 Difference]: Finished difference. Result has 112 places, 80 transitions, 431 flow [2024-11-07 19:23:33,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=112, PETRI_TRANSITIONS=80} [2024-11-07 19:23:33,379 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2024-11-07 19:23:33,380 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 80 transitions, 431 flow [2024-11-07 19:23:33,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 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 19:23:33,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:33,380 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:33,398 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 19:23:33,581 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,SelfDestructingSolverStorable13 [2024-11-07 19:23:33,581 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:33,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1596799452, now seen corresponding path program 1 times [2024-11-07 19:23:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:33,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320735172] [2024-11-07 19:23:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2024-11-07 19:23:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320735172] [2024-11-07 19:23:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320735172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:33,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:33,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:23:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742054772] [2024-11-07 19:23:33,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:33,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:23:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:33,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:23:33,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:23:34,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 73 [2024-11-07 19:23:34,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 80 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:23:34,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:34,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 73 [2024-11-07 19:23:34,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:34,129 INFO L124 PetriNetUnfolderBase]: 72/359 cut-off events. [2024-11-07 19:23:34,129 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-11-07 19:23:34,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 359 events. 72/359 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1186 event pairs, 51 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 783. Up to 214 conditions per place. [2024-11-07 19:23:34,132 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 61 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-11-07 19:23:34,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 571 flow [2024-11-07 19:23:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:23:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:23:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-11-07 19:23:34,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2024-11-07 19:23:34,134 INFO L175 Difference]: Start difference. First operand has 112 places, 80 transitions, 431 flow. Second operand 3 states and 164 transitions. [2024-11-07 19:23:34,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 571 flow [2024-11-07 19:23:34,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 85 transitions, 534 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 19:23:34,138 INFO L231 Difference]: Finished difference. Result has 108 places, 78 transitions, 397 flow [2024-11-07 19:23:34,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=108, PETRI_TRANSITIONS=78} [2024-11-07 19:23:34,139 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2024-11-07 19:23:34,139 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 78 transitions, 397 flow [2024-11-07 19:23:34,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:23:34,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:34,139 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:34,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:23:34,139 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:34,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1596799451, now seen corresponding path program 1 times [2024-11-07 19:23:34,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469429921] [2024-11-07 19:23:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:23:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2024-11-07 19:23:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:23:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469429921] [2024-11-07 19:23:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469429921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:23:34,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:23:34,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:23:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609804249] [2024-11-07 19:23:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:23:34,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:23:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:23:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:23:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:23:34,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2024-11-07 19:23:34,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 78 transitions, 397 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 19:23:34,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:23:34,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2024-11-07 19:23:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:23:34,787 INFO L124 PetriNetUnfolderBase]: 65/337 cut-off events. [2024-11-07 19:23:34,787 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-11-07 19:23:34,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 337 events. 65/337 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1021 event pairs, 50 based on Foata normal form. 16/320 useless extension candidates. Maximal degree in co-relation 728. Up to 214 conditions per place. [2024-11-07 19:23:34,790 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 60 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2024-11-07 19:23:34,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 83 transitions, 534 flow [2024-11-07 19:23:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:23:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:23:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2024-11-07 19:23:34,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7579908675799086 [2024-11-07 19:23:34,792 INFO L175 Difference]: Start difference. First operand has 108 places, 78 transitions, 397 flow. Second operand 3 states and 166 transitions. [2024-11-07 19:23:34,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 83 transitions, 534 flow [2024-11-07 19:23:34,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 83 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:23:34,796 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 393 flow [2024-11-07 19:23:34,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2024-11-07 19:23:34,796 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2024-11-07 19:23:34,796 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 393 flow [2024-11-07 19:23:34,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 19:23:34,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:23:34,797 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:23:34,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:23:34,797 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:23:34,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:23:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2002251012, now seen corresponding path program 1 times [2024-11-07 19:23:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:23:34,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155551918] [2024-11-07 19:23:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:23:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:23:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat