./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1 --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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:09:23,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:09:23,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:09:23,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:09:23,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:09:23,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:09:23,797 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:09:23,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:09:23,798 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:09:23,798 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:09:23,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:09:23,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:09:23,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:09:23,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:09:23,799 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:09:23,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:09:23,799 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:09:23,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:09:23,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:09:23,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:09:23,801 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:09:23,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:09:23,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:09:23,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:09:23,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:09:23,802 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1 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 -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2024-12-02 07:09:24,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:09:24,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:09:24,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:09:24,056 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:09:24,057 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:09:24,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2024-12-02 07:09:26,970 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/data/d9f03e764/9b4ae651c9104bfa8fe4bc987fe33a5b/FLAG558414cfb [2024-12-02 07:09:27,222 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:09:27,222 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2024-12-02 07:09:27,237 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/data/d9f03e764/9b4ae651c9104bfa8fe4bc987fe33a5b/FLAG558414cfb [2024-12-02 07:09:27,251 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/data/d9f03e764/9b4ae651c9104bfa8fe4bc987fe33a5b [2024-12-02 07:09:27,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:09:27,255 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:09:27,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:09:27,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:09:27,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:09:27,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:09:27" (1/1) ... [2024-12-02 07:09:27,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238ecbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:27, skipping insertion in model container [2024-12-02 07:09:27,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:09:27" (1/1) ... [2024-12-02 07:09:27,293 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:09:27,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:09:27,860 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:09:27,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:09:28,012 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:09:28,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28 WrapperNode [2024-12-02 07:09:28,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:09:28,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:09:28,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:09:28,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:09:28,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,119 INFO L138 Inliner]: procedures = 280, calls = 1603, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1769 [2024-12-02 07:09:28,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:09:28,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:09:28,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:09:28,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:09:28,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,146 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,182 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 2, 259, 5, 1280, 14, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 0, 256, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 1, 1, 0, 0, 8, 1]. [2024-12-02 07:09:28,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,240 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,242 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:09:28,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:09:28,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:09:28,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:09:28,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (1/1) ... [2024-12-02 07:09:28,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:09:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:09:28,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:09:28,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:09:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-12-02 07:09:28,327 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 07:09:28,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-12-02 07:09:28,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-12-02 07:09:28,329 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:09:28,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-12-02 07:09:28,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-12-02 07:09:28,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-12-02 07:09:28,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:09:28,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:09:28,333 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 07:09:28,502 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:09:28,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:09:30,368 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:09:30,368 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:09:59,505 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:09:59,505 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-12-02 07:09:59,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:09:59 BoogieIcfgContainer [2024-12-02 07:09:59,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:09:59,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:09:59,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:09:59,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:09:59,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:09:27" (1/3) ... [2024-12-02 07:09:59,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3084c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:09:59, skipping insertion in model container [2024-12-02 07:09:59,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:09:28" (2/3) ... [2024-12-02 07:09:59,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3084c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:09:59, skipping insertion in model container [2024-12-02 07:09:59,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:09:59" (3/3) ... [2024-12-02 07:09:59,514 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree-deref.i [2024-12-02 07:09:59,526 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:09:59,528 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_87-lists_racefree-deref.i that has 3 procedures, 123 locations, 1 initial locations, 11 loop locations, and 44 error locations. [2024-12-02 07:09:59,528 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:09:59,646 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 07:09:59,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2024-12-02 07:09:59,804 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2024-12-02 07:09:59,806 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-12-02 07:09:59,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1543 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2024-12-02 07:09:59,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2024-12-02 07:09:59,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2024-12-02 07:09:59,826 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:09:59,840 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;@6568ab1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:09:59,840 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-12-02 07:09:59,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:09:59,913 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-12-02 07:09:59,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 07:09:59,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:09:59,914 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:09:59,914 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:09:59,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:09:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 3713307, now seen corresponding path program 1 times [2024-12-02 07:09:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:09:59,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105700074] [2024-12-02 07:09:59,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:09:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:01,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105700074] [2024-12-02 07:10:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105700074] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:01,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158578971] [2024-12-02 07:10:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:01,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:10:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:01,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:10:01,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:10:01,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-12-02 07:10:01,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2024-12-02 07:10:01,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:01,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-12-02 07:10:01,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:02,567 INFO L124 PetriNetUnfolderBase]: 3268/7639 cut-off events. [2024-12-02 07:10:02,568 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-12-02 07:10:02,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 7639 events. 3268/7639 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 62305 event pairs, 3059 based on Foata normal form. 520/6983 useless extension candidates. Maximal degree in co-relation 11429. Up to 5189 conditions per place. [2024-12-02 07:10:02,636 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-12-02 07:10:02,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2024-12-02 07:10:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-12-02 07:10:02,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-12-02 07:10:02,651 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2024-12-02 07:10:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2024-12-02 07:10:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 07:10:02,662 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2024-12-02 07:10:02,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2024-12-02 07:10:02,668 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-12-02 07:10:02,668 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2024-12-02 07:10:02,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2024-12-02 07:10:02,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:02,668 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:10:02,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:10:02,669 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:02,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 3713308, now seen corresponding path program 1 times [2024-12-02 07:10:02,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:02,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320685346] [2024-12-02 07:10:02,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:02,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:03,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320685346] [2024-12-02 07:10:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320685346] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:03,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55060081] [2024-12-02 07:10:03,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:03,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:10:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:03,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:10:03,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:10:03,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2024-12-02 07:10:03,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-12-02 07:10:03,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:03,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2024-12-02 07:10:03,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:04,835 INFO L124 PetriNetUnfolderBase]: 3268/7637 cut-off events. [2024-12-02 07:10:04,835 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-12-02 07:10:04,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 7637 events. 3268/7637 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 62338 event pairs, 3059 based on Foata normal form. 2/6464 useless extension candidates. Maximal degree in co-relation 12915. Up to 5189 conditions per place. [2024-12-02 07:10:04,883 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-12-02 07:10:04,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2024-12-02 07:10:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-12-02 07:10:04,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-12-02 07:10:04,885 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2024-12-02 07:10:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2024-12-02 07:10:04,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:10:04,889 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2024-12-02 07:10:04,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-12-02 07:10:04,890 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-12-02 07:10:04,890 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2024-12-02 07:10:04,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2024-12-02 07:10:04,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:04,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-12-02 07:10:04,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:10:04,891 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:04,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 115118597, now seen corresponding path program 1 times [2024-12-02 07:10:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:04,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822135844] [2024-12-02 07:10:04,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:05,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822135844] [2024-12-02 07:10:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822135844] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:05,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:05,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466690188] [2024-12-02 07:10:05,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:05,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:10:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:05,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:10:05,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:10:05,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-12-02 07:10:05,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:10:05,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:05,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-12-02 07:10:05,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:05,844 INFO L124 PetriNetUnfolderBase]: 3268/7643 cut-off events. [2024-12-02 07:10:05,844 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-12-02 07:10:05,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12942 conditions, 7643 events. 3268/7643 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 62280 event pairs, 3059 based on Foata normal form. 1/6468 useless extension candidates. Maximal degree in co-relation 12917. Up to 5190 conditions per place. [2024-12-02 07:10:05,887 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-12-02 07:10:05,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2024-12-02 07:10:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-12-02 07:10:05,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-12-02 07:10:05,890 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2024-12-02 07:10:05,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2024-12-02 07:10:05,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:10:05,895 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2024-12-02 07:10:05,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-12-02 07:10:05,896 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2024-12-02 07:10:05,896 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2024-12-02 07:10:05,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:10:05,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:05,897 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-12-02 07:10:05,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:10:05,897 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:05,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash -726361138, now seen corresponding path program 1 times [2024-12-02 07:10:05,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:05,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661180214] [2024-12-02 07:10:05,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:05,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:06,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661180214] [2024-12-02 07:10:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661180214] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:06,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:10:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905010195] [2024-12-02 07:10:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:06,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:10:06,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:06,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:10:06,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:10:06,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:10:06,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-12-02 07:10:06,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:06,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:10:06,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:07,294 INFO L124 PetriNetUnfolderBase]: 4054/9568 cut-off events. [2024-12-02 07:10:07,294 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-12-02 07:10:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16325 conditions, 9568 events. 4054/9568 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83952 event pairs, 2177 based on Foata normal form. 2/8060 useless extension candidates. Maximal degree in co-relation 16305. Up to 3712 conditions per place. [2024-12-02 07:10:07,329 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2024-12-02 07:10:07,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2024-12-02 07:10:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:10:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:10:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2024-12-02 07:10:07,331 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2024-12-02 07:10:07,331 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2024-12-02 07:10:07,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2024-12-02 07:10:07,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:10:07,336 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2024-12-02 07:10:07,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-12-02 07:10:07,337 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2024-12-02 07:10:07,338 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2024-12-02 07:10:07,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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) [2024-12-02 07:10:07,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:07,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-12-02 07:10:07,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:10:07,338 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:07,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash -726361137, now seen corresponding path program 1 times [2024-12-02 07:10:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668123573] [2024-12-02 07:10:07,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:07,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:07,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668123573] [2024-12-02 07:10:07,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668123573] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:07,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:07,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120503690] [2024-12-02 07:10:07,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:07,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:10:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:07,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:10:07,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:10:07,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:10:07,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-12-02 07:10:07,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:07,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:10:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:08,738 INFO L124 PetriNetUnfolderBase]: 4084/9846 cut-off events. [2024-12-02 07:10:08,738 INFO L125 PetriNetUnfolderBase]: For 1603/1603 co-relation queries the response was YES. [2024-12-02 07:10:08,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17738 conditions, 9846 events. 4084/9846 cut-off events. For 1603/1603 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 86459 event pairs, 3767 based on Foata normal form. 1/8422 useless extension candidates. Maximal degree in co-relation 17704. Up to 6645 conditions per place. [2024-12-02 07:10:08,772 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-12-02 07:10:08,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2024-12-02 07:10:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-12-02 07:10:08,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-12-02 07:10:08,773 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2024-12-02 07:10:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2024-12-02 07:10:08,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:10:08,779 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2024-12-02 07:10:08,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2024-12-02 07:10:08,780 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2024-12-02 07:10:08,780 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2024-12-02 07:10:08,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2024-12-02 07:10:08,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:08,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:10:08,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:10:08,781 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:08,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash -975605489, now seen corresponding path program 1 times [2024-12-02 07:10:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266977565] [2024-12-02 07:10:08,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:08,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266977565] [2024-12-02 07:10:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266977565] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:10:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436862526] [2024-12-02 07:10:08,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:08,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:10:08,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:10:08,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:10:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:09,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 3752 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 07:10:09,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:10:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:09,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:10:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:09,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436862526] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:10:09,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:10:09,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 07:10:09,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466868668] [2024-12-02 07:10:09,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:10:09,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:10:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:09,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:10:09,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:10:09,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-12-02 07:10:09,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-12-02 07:10:09,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:09,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-12-02 07:10:09,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:10,409 INFO L124 PetriNetUnfolderBase]: 3973/9626 cut-off events. [2024-12-02 07:10:10,409 INFO L125 PetriNetUnfolderBase]: For 986/1044 co-relation queries the response was YES. [2024-12-02 07:10:10,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17201 conditions, 9626 events. 3973/9626 cut-off events. For 986/1044 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 84275 event pairs, 3660 based on Foata normal form. 3/8218 useless extension candidates. Maximal degree in co-relation 17176. Up to 6451 conditions per place. [2024-12-02 07:10:10,443 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2024-12-02 07:10:10,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2024-12-02 07:10:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:10:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 07:10:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2024-12-02 07:10:10,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2024-12-02 07:10:10,445 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2024-12-02 07:10:10,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2024-12-02 07:10:10,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:10:10,449 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2024-12-02 07:10:10,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2024-12-02 07:10:10,450 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-12-02 07:10:10,450 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2024-12-02 07:10:10,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2024-12-02 07:10:10,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:10,451 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-12-02 07:10:10,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:10:10,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 07:10:10,651 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:10,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -179069435, now seen corresponding path program 1 times [2024-12-02 07:10:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:10,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913873160] [2024-12-02 07:10:10,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913873160] [2024-12-02 07:10:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913873160] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:10:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577511467] [2024-12-02 07:10:11,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:11,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:10:11,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:10:11,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:10:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:12,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 07:10:12,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:10:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:12,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:12,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:12,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:12,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:10:12,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:10:12,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-12-02 07:10:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:12,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577511467] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:10:12,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:10:12,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-12-02 07:10:12,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061717933] [2024-12-02 07:10:12,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:10:12,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:10:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:12,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:10:12,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:10:13,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:10:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-12-02 07:10:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:10:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:14,997 INFO L124 PetriNetUnfolderBase]: 4084/9858 cut-off events. [2024-12-02 07:10:14,998 INFO L125 PetriNetUnfolderBase]: For 1098/1098 co-relation queries the response was YES. [2024-12-02 07:10:15,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17788 conditions, 9858 events. 4084/9858 cut-off events. For 1098/1098 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 86459 event pairs, 3767 based on Foata normal form. 3/8436 useless extension candidates. Maximal degree in co-relation 17755. Up to 6645 conditions per place. [2024-12-02 07:10:15,039 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 69 selfloop transitions, 6 changer transitions 0/139 dead transitions. [2024-12-02 07:10:15,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 532 flow [2024-12-02 07:10:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:10:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 07:10:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2024-12-02 07:10:15,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-12-02 07:10:15,041 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 7 states and 552 transitions. [2024-12-02 07:10:15,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 532 flow [2024-12-02 07:10:15,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-12-02 07:10:15,045 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 386 flow [2024-12-02 07:10:15,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-12-02 07:10:15,046 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 20 predicate places. [2024-12-02 07:10:15,046 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 386 flow [2024-12-02 07:10:15,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 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) [2024-12-02 07:10:15,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:15,047 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-12-02 07:10:15,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:10:15,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:15,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:15,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -252014547, now seen corresponding path program 2 times [2024-12-02 07:10:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130070305] [2024-12-02 07:10:15,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:10:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:15,305 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:10:15,305 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:10:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:10:15,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130070305] [2024-12-02 07:10:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130070305] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334807926] [2024-12-02 07:10:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:15,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:10:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:15,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:10:15,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:10:15,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:10:15,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2024-12-02 07:10:15,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:15,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:10:15,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:16,331 INFO L124 PetriNetUnfolderBase]: 4432/10497 cut-off events. [2024-12-02 07:10:16,331 INFO L125 PetriNetUnfolderBase]: For 924/924 co-relation queries the response was YES. [2024-12-02 07:10:16,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18968 conditions, 10497 events. 4432/10497 cut-off events. For 924/924 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 94079 event pairs, 2895 based on Foata normal form. 0/8975 useless extension candidates. Maximal degree in co-relation 18925. Up to 4460 conditions per place. [2024-12-02 07:10:16,387 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 102 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2024-12-02 07:10:16,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 666 flow [2024-12-02 07:10:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2024-12-02 07:10:16,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-12-02 07:10:16,389 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 386 flow. Second operand 3 states and 302 transitions. [2024-12-02 07:10:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 666 flow [2024-12-02 07:10:16,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 656 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-12-02 07:10:16,397 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 376 flow [2024-12-02 07:10:16,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2024-12-02 07:10:16,397 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 16 predicate places. [2024-12-02 07:10:16,397 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 376 flow [2024-12-02 07:10:16,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2024-12-02 07:10:16,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:16,398 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-12-02 07:10:16,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 07:10:16,398 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:16,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash -252014546, now seen corresponding path program 1 times [2024-12-02 07:10:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:16,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839533051] [2024-12-02 07:10:16,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:16,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:16,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839533051] [2024-12-02 07:10:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839533051] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:10:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425632518] [2024-12-02 07:10:16,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:10:16,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:10:16,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:10:16,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:10:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:10:17,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 3977 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 07:10:17,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:10:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:17,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:10:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425632518] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:10:17,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:10:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-12-02 07:10:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531517603] [2024-12-02 07:10:17,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:10:17,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:10:17,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:17,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:10:17,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:10:17,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-12-02 07:10:17,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-12-02 07:10:17,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:17,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-12-02 07:10:17,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:18,247 INFO L124 PetriNetUnfolderBase]: 3973/9641 cut-off events. [2024-12-02 07:10:18,247 INFO L125 PetriNetUnfolderBase]: For 1617/1675 co-relation queries the response was YES. [2024-12-02 07:10:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17584 conditions, 9641 events. 3973/9641 cut-off events. For 1617/1675 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 84181 event pairs, 3660 based on Foata normal form. 6/8248 useless extension candidates. Maximal degree in co-relation 17520. Up to 6451 conditions per place. [2024-12-02 07:10:18,287 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-12-02 07:10:18,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 153 transitions, 658 flow [2024-12-02 07:10:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:10:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:10:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2024-12-02 07:10:18,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-12-02 07:10:18,289 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 376 flow. Second operand 12 states and 956 transitions. [2024-12-02 07:10:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 153 transitions, 658 flow [2024-12-02 07:10:18,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 153 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:10:18,294 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 472 flow [2024-12-02 07:10:18,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2024-12-02 07:10:18,295 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 32 predicate places. [2024-12-02 07:10:18,295 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 472 flow [2024-12-02 07:10:18,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 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) [2024-12-02 07:10:18,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:18,295 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-12-02 07:10:18,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:10:18,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:18,496 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:18,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash 777413287, now seen corresponding path program 2 times [2024-12-02 07:10:18,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:18,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178529978] [2024-12-02 07:10:18,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:10:18,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:18,626 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:10:18,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:10:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:19,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:19,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178529978] [2024-12-02 07:10:19,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178529978] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:10:19,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806167125] [2024-12-02 07:10:19,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:10:19,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:10:19,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:10:19,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:10:20,478 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:10:20,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:10:20,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 4014 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-12-02 07:10:20,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:10:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:20,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:20,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:20,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:20,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:20,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:20,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:10:20,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:10:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:20,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:10:21,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:10:21,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-12-02 07:10:21,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:10:21,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-12-02 07:10:21,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:10:21,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-12-02 07:10:21,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:10:21,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-12-02 07:10:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806167125] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:10:21,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:10:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-12-02 07:10:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743010521] [2024-12-02 07:10:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:10:21,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 07:10:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:21,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 07:10:21,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2024-12-02 07:10:29,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:10:29,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 137 transitions, 472 flow. Second operand has 32 states, 32 states have (on average 69.5) internal successors, (2224), 32 states have internal predecessors, (2224), 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) [2024-12-02 07:10:29,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:29,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:10:29,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:31,783 INFO L124 PetriNetUnfolderBase]: 4084/9870 cut-off events. [2024-12-02 07:10:31,783 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-12-02 07:10:31,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17900 conditions, 9870 events. 4084/9870 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 86274 event pairs, 3767 based on Foata normal form. 6/8463 useless extension candidates. Maximal degree in co-relation 17850. Up to 6645 conditions per place. [2024-12-02 07:10:31,830 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 80 selfloop transitions, 13 changer transitions 0/155 dead transitions. [2024-12-02 07:10:31,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 155 transitions, 742 flow [2024-12-02 07:10:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 07:10:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 07:10:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1049 transitions. [2024-12-02 07:10:31,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5203373015873016 [2024-12-02 07:10:31,834 INFO L175 Difference]: Start difference. First operand has 161 places, 137 transitions, 472 flow. Second operand 14 states and 1049 transitions. [2024-12-02 07:10:31,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 155 transitions, 742 flow [2024-12-02 07:10:31,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 155 transitions, 724 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-12-02 07:10:31,839 INFO L231 Difference]: Finished difference. Result has 177 places, 139 transitions, 528 flow [2024-12-02 07:10:31,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=528, PETRI_PLACES=177, PETRI_TRANSITIONS=139} [2024-12-02 07:10:31,840 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 48 predicate places. [2024-12-02 07:10:31,840 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 139 transitions, 528 flow [2024-12-02 07:10:31,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.5) internal successors, (2224), 32 states have internal predecessors, (2224), 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) [2024-12-02 07:10:31,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:31,841 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2024-12-02 07:10:31,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:10:32,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:32,042 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:32,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1294133398, now seen corresponding path program 2 times [2024-12-02 07:10:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703200459] [2024-12-02 07:10:32,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:10:32,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:32,194 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:10:32,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:10:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 07:10:32,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:32,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703200459] [2024-12-02 07:10:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703200459] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:10:32,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:10:32,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:10:32,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703878419] [2024-12-02 07:10:32,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:10:32,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:10:32,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:10:32,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:10:32,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:10:32,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 144 [2024-12-02 07:10:32,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 139 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-12-02 07:10:32,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:10:32,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 144 [2024-12-02 07:10:32,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:10:33,372 INFO L124 PetriNetUnfolderBase]: 3888/9248 cut-off events. [2024-12-02 07:10:33,372 INFO L125 PetriNetUnfolderBase]: For 1208/1267 co-relation queries the response was YES. [2024-12-02 07:10:33,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16812 conditions, 9248 events. 3888/9248 cut-off events. For 1208/1267 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 79380 event pairs, 3604 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 16748. Up to 6318 conditions per place. [2024-12-02 07:10:33,421 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 75 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2024-12-02 07:10:33,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 142 transitions, 690 flow [2024-12-02 07:10:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:10:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:10:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-12-02 07:10:33,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6412037037037037 [2024-12-02 07:10:33,422 INFO L175 Difference]: Start difference. First operand has 177 places, 139 transitions, 528 flow. Second operand 3 states and 277 transitions. [2024-12-02 07:10:33,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 142 transitions, 690 flow [2024-12-02 07:10:33,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 142 transitions, 662 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-12-02 07:10:33,430 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 521 flow [2024-12-02 07:10:33,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-12-02 07:10:33,430 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 40 predicate places. [2024-12-02 07:10:33,430 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 521 flow [2024-12-02 07:10:33,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2024-12-02 07:10:33,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:10:33,431 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 1, 1] [2024-12-02 07:10:33,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 07:10:33,431 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:10:33,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:10:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1463500053, now seen corresponding path program 3 times [2024-12-02 07:10:33,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:10:33,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264483048] [2024-12-02 07:10:33,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:10:33,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:10:35,174 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 07:10:35,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:10:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:10:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:10:38,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264483048] [2024-12-02 07:10:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264483048] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:10:38,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258230387] [2024-12-02 07:10:38,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:10:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:10:38,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:10:38,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:10:38,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:11:59,022 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 07:11:59,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:11:59,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 4464 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-12-02 07:11:59,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:11:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,896 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 07:11:59,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-02 07:11:59,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:11:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:11:59,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:12:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:12:00,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:12:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:00,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:12:00,321 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:00,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:00,953 INFO L349 Elim1Store]: treesize reduction 14, result has 44.0 percent of original size [2024-12-02 07:12:00,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2024-12-02 07:12:01,214 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:01,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:01,473 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:01,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:01,733 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:01,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:02,007 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:02,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:02,287 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:02,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:02,564 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:02,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:02,885 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:12:02,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-12-02 07:12:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:03,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258230387] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:12:03,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:12:03,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 31] total 74 [2024-12-02 07:12:03,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387881509] [2024-12-02 07:12:03,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:12:03,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-12-02 07:12:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:12:03,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-12-02 07:12:03,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=4406, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 07:12:18,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-12-02 07:12:18,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 141 transitions, 521 flow. Second operand has 76 states, 76 states have (on average 69.34210526315789) internal successors, (5270), 76 states have internal predecessors, (5270), 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) [2024-12-02 07:12:18,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:12:18,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-12-02 07:12:18,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:12:23,880 INFO L124 PetriNetUnfolderBase]: 4008/9632 cut-off events. [2024-12-02 07:12:23,880 INFO L125 PetriNetUnfolderBase]: For 2822/2828 co-relation queries the response was YES. [2024-12-02 07:12:23,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18171 conditions, 9632 events. 4008/9632 cut-off events. For 2822/2828 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 83962 event pairs, 3598 based on Foata normal form. 13/8427 useless extension candidates. Maximal degree in co-relation 18108. Up to 6345 conditions per place. [2024-12-02 07:12:23,939 INFO L140 encePairwiseOnDemand]: 133/144 looper letters, 161 selfloop transitions, 52 changer transitions 0/275 dead transitions. [2024-12-02 07:12:23,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 275 transitions, 1762 flow [2024-12-02 07:12:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 07:12:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-12-02 07:12:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2738 transitions. [2024-12-02 07:12:23,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-12-02 07:12:23,943 INFO L175 Difference]: Start difference. First operand has 169 places, 141 transitions, 521 flow. Second operand 37 states and 2738 transitions. [2024-12-02 07:12:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 275 transitions, 1762 flow [2024-12-02 07:12:23,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 275 transitions, 1748 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:12:23,953 INFO L231 Difference]: Finished difference. Result has 219 places, 178 transitions, 1247 flow [2024-12-02 07:12:23,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1247, PETRI_PLACES=219, PETRI_TRANSITIONS=178} [2024-12-02 07:12:23,953 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 90 predicate places. [2024-12-02 07:12:23,953 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 178 transitions, 1247 flow [2024-12-02 07:12:23,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 69.34210526315789) internal successors, (5270), 76 states have internal predecessors, (5270), 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) [2024-12-02 07:12:23,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:12:23,955 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:12:24,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 07:12:24,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 07:12:24,156 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:12:24,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:12:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1466693914, now seen corresponding path program 1 times [2024-12-02 07:12:24,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:12:24,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129006469] [2024-12-02 07:12:24,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:12:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:12:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:12:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 07:12:24,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:12:24,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129006469] [2024-12-02 07:12:24,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129006469] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:12:24,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:12:24,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:12:24,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097217981] [2024-12-02 07:12:24,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:12:24,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:12:24,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:12:24,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:12:24,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:12:24,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-12-02 07:12:24,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 178 transitions, 1247 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:12:24,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:12:24,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-12-02 07:12:24,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:12:26,172 INFO L124 PetriNetUnfolderBase]: 5106/12107 cut-off events. [2024-12-02 07:12:26,172 INFO L125 PetriNetUnfolderBase]: For 4778/4940 co-relation queries the response was YES. [2024-12-02 07:12:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23857 conditions, 12107 events. 5106/12107 cut-off events. For 4778/4940 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 109191 event pairs, 3481 based on Foata normal form. 52/10568 useless extension candidates. Maximal degree in co-relation 23767. Up to 6816 conditions per place. [2024-12-02 07:12:26,232 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 155 selfloop transitions, 6 changer transitions 0/225 dead transitions. [2024-12-02 07:12:26,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 225 transitions, 1693 flow [2024-12-02 07:12:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:12:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:12:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2024-12-02 07:12:26,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-12-02 07:12:26,233 INFO L175 Difference]: Start difference. First operand has 219 places, 178 transitions, 1247 flow. Second operand 3 states and 315 transitions. [2024-12-02 07:12:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 225 transitions, 1693 flow [2024-12-02 07:12:26,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 225 transitions, 1304 flow, removed 135 selfloop flow, removed 25 redundant places. [2024-12-02 07:12:26,251 INFO L231 Difference]: Finished difference. Result has 198 places, 181 transitions, 901 flow [2024-12-02 07:12:26,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=901, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2024-12-02 07:12:26,252 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 69 predicate places. [2024-12-02 07:12:26,252 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 901 flow [2024-12-02 07:12:26,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:12:26,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:12:26,252 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:12:26,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 07:12:26,252 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:12:26,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:12:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1466693915, now seen corresponding path program 1 times [2024-12-02 07:12:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:12:26,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158118117] [2024-12-02 07:12:26,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:12:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:12:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:12:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:26,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:12:26,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158118117] [2024-12-02 07:12:26,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158118117] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:12:26,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110447080] [2024-12-02 07:12:26,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:12:26,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:12:26,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:12:26,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:12:26,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:12:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:12:27,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 4548 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 07:12:27,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:12:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:27,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:12:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:27,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110447080] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:12:27,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:12:27,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-12-02 07:12:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807233279] [2024-12-02 07:12:27,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:12:27,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 07:12:27,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:12:27,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 07:12:27,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-12-02 07:12:27,783 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-12-02 07:12:27,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 901 flow. Second operand has 27 states, 27 states have (on average 74.85185185185185) internal successors, (2021), 27 states have internal predecessors, (2021), 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) [2024-12-02 07:12:27,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:12:27,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-12-02 07:12:27,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:12:29,335 INFO L124 PetriNetUnfolderBase]: 4198/10273 cut-off events. [2024-12-02 07:12:29,336 INFO L125 PetriNetUnfolderBase]: For 7366/7995 co-relation queries the response was YES. [2024-12-02 07:12:29,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21753 conditions, 10273 events. 4198/10273 cut-off events. For 7366/7995 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 91396 event pairs, 3468 based on Foata normal form. 170/9125 useless extension candidates. Maximal degree in co-relation 21654. Up to 6881 conditions per place. [2024-12-02 07:12:29,393 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 113 selfloop transitions, 26 changer transitions 0/207 dead transitions. [2024-12-02 07:12:29,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 207 transitions, 1227 flow [2024-12-02 07:12:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 07:12:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-12-02 07:12:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2013 transitions. [2024-12-02 07:12:29,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5376602564102564 [2024-12-02 07:12:29,397 INFO L175 Difference]: Start difference. First operand has 198 places, 181 transitions, 901 flow. Second operand 26 states and 2013 transitions. [2024-12-02 07:12:29,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 207 transitions, 1227 flow [2024-12-02 07:12:29,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 1215 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:12:29,414 INFO L231 Difference]: Finished difference. Result has 224 places, 172 transitions, 849 flow [2024-12-02 07:12:29,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=849, PETRI_PLACES=224, PETRI_TRANSITIONS=172} [2024-12-02 07:12:29,415 INFO L279 CegarLoopForPetriNet]: 129 programPoint places, 95 predicate places. [2024-12-02 07:12:29,415 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 172 transitions, 849 flow [2024-12-02 07:12:29,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.85185185185185) internal successors, (2021), 27 states have internal predecessors, (2021), 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) [2024-12-02 07:12:29,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:12:29,416 INFO L206 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 22, 1, 1] [2024-12-02 07:12:29,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:12:29,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 07:12:29,617 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-12-02 07:12:29,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:12:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1818042509, now seen corresponding path program 4 times [2024-12-02 07:12:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:12:29,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687342159] [2024-12-02 07:12:29,618 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:12:29,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:12:30,287 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:12:30,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:12:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:12:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:12:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687342159] [2024-12-02 07:12:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687342159] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:12:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636656753] [2024-12-02 07:12:38,605 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:12:38,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:12:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:12:38,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:12:38,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e021e0e2-0a8d-4b24-97bc-a46169a328f5/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process