./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.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/28-race_reach_82-list_racefree.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', '6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765'] 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/28-race_reach_82-list_racefree.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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:26:35,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:26:35,541 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:26:35,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:26:35,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:26:35,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:26:35,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:26:35,559 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:26:35,559 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:26:35,560 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:26:35,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:26:35,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:26:35,560 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:26:35,561 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:26:35,561 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:26:35,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:26:35,561 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:26:35,562 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:26:35,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:26:35,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:26:35,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:26:35,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:26:35,564 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 -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-11-07 19:26:35,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:26:35,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:26:35,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:26:35,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:26:35,784 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:26:35,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-07 19:26:36,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:26:37,197 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:26:37,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-07 19:26:37,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5b638efd6/6116f7eaaff84884a7c5227d2541a60d/FLAGc06ce1ced [2024-11-07 19:26:37,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5b638efd6/6116f7eaaff84884a7c5227d2541a60d [2024-11-07 19:26:37,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:26:37,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:26:37,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:26:37,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:26:37,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:26:37,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1deeda32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37, skipping insertion in model container [2024-11-07 19:26:37,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,279 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:26:37,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:26:37,543 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:26:37,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:26:37,627 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:26:37,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37 WrapperNode [2024-11-07 19:26:37,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:26:37,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:26:37,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:26:37,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:26:37,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,663 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 224 [2024-11-07 19:26:37,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:26:37,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:26:37,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:26:37,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:26:37,669 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,697 INFO L175 MemorySlicer]: Split 35 memory accesses to 7 slices as follows [14, 2, 2, 5, 5, 5, 2]. 40 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [0, 2, 0, 5, 5, 5, 0]. The 10 writes are split as follows [8, 0, 1, 0, 0, 0, 1]. [2024-11-07 19:26:37,697 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:26:37,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:26:37,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:26:37,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:26:37,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (1/1) ... [2024-11-07 19:26:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:26:37,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:37,751 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 19:26:37,755 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 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-07 19:26:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 19:26:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-07 19:26:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-07 19:26:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-07 19:26:37,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:26:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:26:37,770 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 19:26:37,912 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:26:37,913 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:26:38,248 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:26:38,248 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:26:38,395 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:26:38,395 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-07 19:26:38,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:38 BoogieIcfgContainer [2024-11-07 19:26:38,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:26:38,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:26:38,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:26:38,403 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:26:38,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:26:37" (1/3) ... [2024-11-07 19:26:38,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6439584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:38, skipping insertion in model container [2024-11-07 19:26:38,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:37" (2/3) ... [2024-11-07 19:26:38,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6439584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:38, skipping insertion in model container [2024-11-07 19:26:38,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:38" (3/3) ... [2024-11-07 19:26:38,404 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-11-07 19:26:38,440 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:26:38,441 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-11-07 19:26:38,441 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:26:38,514 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-07 19:26:38,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 133 transitions, 286 flow [2024-11-07 19:26:38,606 INFO L124 PetriNetUnfolderBase]: 38/272 cut-off events. [2024-11-07 19:26:38,609 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-07 19:26:38,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 272 events. 38/272 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1387 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2024-11-07 19:26:38,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 133 transitions, 286 flow [2024-11-07 19:26:38,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 133 transitions, 286 flow [2024-11-07 19:26:38,627 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:26:38,635 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;@30ff7c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:26:38,639 INFO L334 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2024-11-07 19:26:38,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:26:38,645 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-07 19:26:38,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:26:38,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:38,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-07 19:26:38,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:38,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 19196, now seen corresponding path program 1 times [2024-11-07 19:26:38,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:38,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122864567] [2024-11-07 19:26:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:38,886 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 19:26:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122864567] [2024-11-07 19:26:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122864567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:38,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:38,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:26:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565572835] [2024-11-07 19:26:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:38,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:38,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-11-07 19:26:38,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:26:38,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:38,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-11-07 19:26:38,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:39,710 INFO L124 PetriNetUnfolderBase]: 2776/6503 cut-off events. [2024-11-07 19:26:39,710 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-11-07 19:26:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 6503 events. 2776/6503 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 52197 event pairs, 2586 based on Foata normal form. 464/5986 useless extension candidates. Maximal degree in co-relation 9591. Up to 4430 conditions per place. [2024-11-07 19:26:39,750 INFO L140 encePairwiseOnDemand]: 116/133 looper letters, 52 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-07 19:26:39,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 117 transitions, 362 flow [2024-11-07 19:26:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-11-07 19:26:39,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6466165413533834 [2024-11-07 19:26:39,761 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 286 flow. Second operand 3 states and 258 transitions. [2024-11-07 19:26:39,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 117 transitions, 362 flow [2024-11-07 19:26:39,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:26:39,770 INFO L231 Difference]: Finished difference. Result has 118 places, 117 transitions, 258 flow [2024-11-07 19:26:39,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=118, PETRI_TRANSITIONS=117} [2024-11-07 19:26:39,774 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -1 predicate places. [2024-11-07 19:26:39,775 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 117 transitions, 258 flow [2024-11-07 19:26:39,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 19:26:39,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:39,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-07 19:26:39,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:26:39,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:39,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 19197, now seen corresponding path program 1 times [2024-11-07 19:26:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:39,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058132504] [2024-11-07 19:26:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:39,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:39,910 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 19:26:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058132504] [2024-11-07 19:26:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058132504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:39,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:39,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:26:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211099446] [2024-11-07 19:26:39,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:39,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:39,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-11-07 19:26:39,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 117 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 19:26:39,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:39,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-11-07 19:26:39,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:40,519 INFO L124 PetriNetUnfolderBase]: 2776/6501 cut-off events. [2024-11-07 19:26:40,519 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-07 19:26:40,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 6501 events. 2776/6501 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 52233 event pairs, 2586 based on Foata normal form. 2/5522 useless extension candidates. Maximal degree in co-relation 11018. Up to 4430 conditions per place. [2024-11-07 19:26:40,546 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 51 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-11-07 19:26:40,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 360 flow [2024-11-07 19:26:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2024-11-07 19:26:40,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-07 19:26:40,553 INFO L175 Difference]: Start difference. First operand has 118 places, 117 transitions, 258 flow. Second operand 3 states and 247 transitions. [2024-11-07 19:26:40,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 360 flow [2024-11-07 19:26:40,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:40,556 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 254 flow [2024-11-07 19:26:40,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-11-07 19:26:40,558 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -3 predicate places. [2024-11-07 19:26:40,558 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 254 flow [2024-11-07 19:26:40,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 19:26:40,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:40,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:26:40,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:26:40,558 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:40,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 572421084, now seen corresponding path program 1 times [2024-11-07 19:26:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427232314] [2024-11-07 19:26:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:40,634 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 19:26:40,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427232314] [2024-11-07 19:26:40,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427232314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:40,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169002230] [2024-11-07 19:26:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:40,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:40,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 133 [2024-11-07 19:26:40,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 19:26:40,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:40,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 133 [2024-11-07 19:26:40,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:41,159 INFO L124 PetriNetUnfolderBase]: 3172/7101 cut-off events. [2024-11-07 19:26:41,159 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-11-07 19:26:41,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 7101 events. 3172/7101 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 58006 event pairs, 2202 based on Foata normal form. 0/6166 useless extension candidates. Maximal degree in co-relation 12262. Up to 3813 conditions per place. [2024-11-07 19:26:41,188 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 87 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-11-07 19:26:41,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 147 transitions, 496 flow [2024-11-07 19:26:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-11-07 19:26:41,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6942355889724311 [2024-11-07 19:26:41,191 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 254 flow. Second operand 3 states and 277 transitions. [2024-11-07 19:26:41,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 147 transitions, 496 flow [2024-11-07 19:26:41,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 147 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:41,196 INFO L231 Difference]: Finished difference. Result has 114 places, 113 transitions, 250 flow [2024-11-07 19:26:41,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=114, PETRI_TRANSITIONS=113} [2024-11-07 19:26:41,197 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -5 predicate places. [2024-11-07 19:26:41,197 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 113 transitions, 250 flow [2024-11-07 19:26:41,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 19:26:41,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:41,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:26:41,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:26:41,198 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:41,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 572421085, now seen corresponding path program 1 times [2024-11-07 19:26:41,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560788118] [2024-11-07 19:26:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:41,316 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 19:26:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560788118] [2024-11-07 19:26:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560788118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:41,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:41,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112162474] [2024-11-07 19:26:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:41,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:41,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:41,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2024-11-07 19:26:41,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 19:26:41,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:41,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2024-11-07 19:26:41,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:41,900 INFO L124 PetriNetUnfolderBase]: 2693/6180 cut-off events. [2024-11-07 19:26:41,900 INFO L125 PetriNetUnfolderBase]: For 380/384 co-relation queries the response was YES. [2024-11-07 19:26:41,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 6180 events. 2693/6180 cut-off events. For 380/384 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 48945 event pairs, 2532 based on Foata normal form. 1/5349 useless extension candidates. Maximal degree in co-relation 9671. Up to 4269 conditions per place. [2024-11-07 19:26:41,919 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 54 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2024-11-07 19:26:41,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 370 flow [2024-11-07 19:26:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-07 19:26:41,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6365914786967418 [2024-11-07 19:26:41,922 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 250 flow. Second operand 3 states and 254 transitions. [2024-11-07 19:26:41,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 370 flow [2024-11-07 19:26:41,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:41,931 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 267 flow [2024-11-07 19:26:41,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-11-07 19:26:41,932 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -4 predicate places. [2024-11-07 19:26:41,932 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 267 flow [2024-11-07 19:26:41,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 19:26:41,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:41,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:41,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:26:41,933 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:41,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1977082409, now seen corresponding path program 1 times [2024-11-07 19:26:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028317089] [2024-11-07 19:26:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:42,014 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 19:26:42,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028317089] [2024-11-07 19:26:42,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028317089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:42,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:42,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215514128] [2024-11-07 19:26:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:42,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:42,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-11-07 19:26:42,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 19:26:42,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:42,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-11-07 19:26:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:42,532 INFO L124 PetriNetUnfolderBase]: 3410/7730 cut-off events. [2024-11-07 19:26:42,532 INFO L125 PetriNetUnfolderBase]: For 403/407 co-relation queries the response was YES. [2024-11-07 19:26:42,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13474 conditions, 7730 events. 3410/7730 cut-off events. For 403/407 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 63052 event pairs, 2342 based on Foata normal form. 0/6712 useless extension candidates. Maximal degree in co-relation 13403. Up to 4247 conditions per place. [2024-11-07 19:26:42,559 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 97 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2024-11-07 19:26:42,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 159 transitions, 572 flow [2024-11-07 19:26:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2024-11-07 19:26:42,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7293233082706767 [2024-11-07 19:26:42,560 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 267 flow. Second operand 3 states and 291 transitions. [2024-11-07 19:26:42,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 159 transitions, 572 flow [2024-11-07 19:26:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:42,563 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 300 flow [2024-11-07 19:26:42,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2024-11-07 19:26:42,564 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -1 predicate places. [2024-11-07 19:26:42,564 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 300 flow [2024-11-07 19:26:42,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 19:26:42,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:42,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:42,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:26:42,565 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:42,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1977082410, now seen corresponding path program 1 times [2024-11-07 19:26:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736026442] [2024-11-07 19:26:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:42,671 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 19:26:42,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:42,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736026442] [2024-11-07 19:26:42,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736026442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:42,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:42,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:42,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297099126] [2024-11-07 19:26:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:42,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:42,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-11-07 19:26:42,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:26:42,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:42,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-11-07 19:26:42,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:43,199 INFO L124 PetriNetUnfolderBase]: 4197/9380 cut-off events. [2024-11-07 19:26:43,199 INFO L125 PetriNetUnfolderBase]: For 2917/3222 co-relation queries the response was YES. [2024-11-07 19:26:43,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 9380 events. 4197/9380 cut-off events. For 2917/3222 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 79259 event pairs, 3189 based on Foata normal form. 582/8834 useless extension candidates. Maximal degree in co-relation 17409. Up to 5783 conditions per place. [2024-11-07 19:26:43,241 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 98 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2024-11-07 19:26:43,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 162 transitions, 617 flow [2024-11-07 19:26:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2024-11-07 19:26:43,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.731829573934837 [2024-11-07 19:26:43,243 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 300 flow. Second operand 3 states and 292 transitions. [2024-11-07 19:26:43,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 162 transitions, 617 flow [2024-11-07 19:26:43,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 603 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:43,248 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 327 flow [2024-11-07 19:26:43,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-11-07 19:26:43,249 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, 0 predicate places. [2024-11-07 19:26:43,249 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 327 flow [2024-11-07 19:26:43,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:26:43,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:43,250 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:43,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:26:43,250 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:43,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:43,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1159900417, now seen corresponding path program 1 times [2024-11-07 19:26:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411562211] [2024-11-07 19:26:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411562211] [2024-11-07 19:26:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411562211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803350497] [2024-11-07 19:26:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:43,354 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 19:26:43,355 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 19:26:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:43,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:26:43,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:43,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:26:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:43,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803350497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:43,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:43,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-07 19:26:43,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149333184] [2024-11-07 19:26:43,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:43,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:26:43,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:26:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:26:43,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2024-11-07 19:26:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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 19:26:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:43,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2024-11-07 19:26:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:44,271 INFO L124 PetriNetUnfolderBase]: 2427/5592 cut-off events. [2024-11-07 19:26:44,272 INFO L125 PetriNetUnfolderBase]: For 2265/3575 co-relation queries the response was YES. [2024-11-07 19:26:44,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10366 conditions, 5592 events. 2427/5592 cut-off events. For 2265/3575 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 43961 event pairs, 2145 based on Foata normal form. 61/4897 useless extension candidates. Maximal degree in co-relation 10155. Up to 3817 conditions per place. [2024-11-07 19:26:44,304 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 66 selfloop transitions, 7 changer transitions 0/132 dead transitions. [2024-11-07 19:26:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 132 transitions, 493 flow [2024-11-07 19:26:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:26:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:26:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 457 transitions. [2024-11-07 19:26:44,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5726817042606517 [2024-11-07 19:26:44,308 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 327 flow. Second operand 6 states and 457 transitions. [2024-11-07 19:26:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 132 transitions, 493 flow [2024-11-07 19:26:44,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 132 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:44,313 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 326 flow [2024-11-07 19:26:44,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-11-07 19:26:44,314 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, 3 predicate places. [2024-11-07 19:26:44,314 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 326 flow [2024-11-07 19:26:44,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 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 19:26:44,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:44,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:44,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:26:44,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:44,515 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:44,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1597301789, now seen corresponding path program 1 times [2024-11-07 19:26:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100262318] [2024-11-07 19:26:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:44,574 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 19:26:44,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100262318] [2024-11-07 19:26:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100262318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085303388] [2024-11-07 19:26:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:44,577 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 19:26:44,579 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 19:26:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:44,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:26:44,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:44,705 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 19:26:44,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:44,722 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 19:26:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085303388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:44,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-07 19:26:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617496307] [2024-11-07 19:26:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:44,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:26:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:26:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:26:44,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 133 [2024-11-07 19:26:44,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 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 19:26:44,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:44,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 133 [2024-11-07 19:26:44,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:44,766 INFO L124 PetriNetUnfolderBase]: 12/73 cut-off events. [2024-11-07 19:26:44,766 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-07 19:26:44,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 73 events. 12/73 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 228 event pairs, 6 based on Foata normal form. 6/63 useless extension candidates. Maximal degree in co-relation 147. Up to 26 conditions per place. [2024-11-07 19:26:44,766 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-07 19:26:44,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 144 flow [2024-11-07 19:26:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:26:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:26:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2024-11-07 19:26:44,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5319548872180451 [2024-11-07 19:26:44,768 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 326 flow. Second operand 4 states and 283 transitions. [2024-11-07 19:26:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 144 flow [2024-11-07 19:26:44,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 115 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-07 19:26:44,769 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 71 flow [2024-11-07 19:26:44,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2024-11-07 19:26:44,769 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -84 predicate places. [2024-11-07 19:26:44,769 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 71 flow [2024-11-07 19:26:44,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 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 19:26:44,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:44,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:44,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:26:44,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:44,970 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2024-11-07 19:26:44,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1597175266, now seen corresponding path program 1 times [2024-11-07 19:26:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:44,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075879879] [2024-11-07 19:26:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 19:26:44,994 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 19:26:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 19:26:45,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 19:26:45,023 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 19:26:45,024 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2024-11-07 19:26:45,026 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2024-11-07 19:26:45,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2024-11-07 19:26:45,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2024-11-07 19:26:45,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2024-11-07 19:26:45,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2024-11-07 19:26:45,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2024-11-07 19:26:45,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:26:45,032 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:45,033 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 19:26:45,033 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-07 19:26:45,093 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-07 19:26:45,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 231 transitions, 506 flow [2024-11-07 19:26:45,174 INFO L124 PetriNetUnfolderBase]: 147/845 cut-off events. [2024-11-07 19:26:45,175 INFO L125 PetriNetUnfolderBase]: For 72/89 co-relation queries the response was YES. [2024-11-07 19:26:45,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 845 events. 147/845 cut-off events. For 72/89 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6036 event pairs, 1 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 533. Up to 32 conditions per place. [2024-11-07 19:26:45,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 231 transitions, 506 flow [2024-11-07 19:26:45,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 231 transitions, 506 flow [2024-11-07 19:26:45,193 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:26:45,194 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;@30ff7c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:26:45,194 INFO L334 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2024-11-07 19:26:45,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:26:45,195 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-07 19:26:45,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:26:45,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:45,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-07 19:26:45,195 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2024-11-07 19:26:45,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 26524, now seen corresponding path program 1 times [2024-11-07 19:26:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184640847] [2024-11-07 19:26:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:45,222 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 19:26:45,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184640847] [2024-11-07 19:26:45,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184640847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:45,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:45,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:26:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226028850] [2024-11-07 19:26:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:45,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:45,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:45,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 231 [2024-11-07 19:26:45,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 231 transitions, 506 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 19:26:45,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:45,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 231 [2024-11-07 19:26:45,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand