./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.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_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB --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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:26:17,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:26:17,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:26:17,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:26:17,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:26:17,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:26:17,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:26:17,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:26:17,460 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:26:17,460 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:26:17,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:26:17,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:26:17,461 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:26:17,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:26:17,461 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:26:17,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:26:17,461 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:26:17,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:26:17,461 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:26:17,462 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:26:17,463 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:26:17,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:26:17,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:26:17,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:26:17,464 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:26:17,465 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:26:17,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:26:17,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:26:17,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:26:17,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:26:17,466 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_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB 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 -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2024-11-27 20:26:17,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:26:17,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:26:17,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:26:17,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:26:17,878 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:26:17,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-11-27 20:26:21,600 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/data/857bb6072/8e002f058838449f957fdc69f4aafa00/FLAGcb46e887b [2024-11-27 20:26:22,137 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:26:22,138 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2024-11-27 20:26:22,162 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/data/857bb6072/8e002f058838449f957fdc69f4aafa00/FLAGcb46e887b [2024-11-27 20:26:22,190 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/data/857bb6072/8e002f058838449f957fdc69f4aafa00 [2024-11-27 20:26:22,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:26:22,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:26:22,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:26:22,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:26:22,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:26:22,206 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:26:22" (1/1) ... [2024-11-27 20:26:22,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45866a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:22, skipping insertion in model container [2024-11-27 20:26:22,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:26:22" (1/1) ... [2024-11-27 20:26:22,278 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:26:22,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:26:22,998 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:26:23,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:26:23,147 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:26:23,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23 WrapperNode [2024-11-27 20:26:23,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:26:23,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:26:23,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:26:23,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:26:23,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,256 INFO L138 Inliner]: procedures = 272, calls = 110, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 330 [2024-11-27 20:26:23,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:26:23,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:26:23,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:26:23,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:26:23,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,328 INFO L175 MemorySlicer]: Split 84 memory accesses to 4 slices as follows [2, 5, 2, 75]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 0, 60]. The 7 writes are split as follows [0, 0, 1, 6]. [2024-11-27 20:26:23,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,348 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,377 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:26:23,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:26:23,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:26:23,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:26:23,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (1/1) ... [2024-11-27 20:26:23,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:26:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:23,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:26:23,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:26:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:26:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 20:26:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-27 20:26:23,477 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:26:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:26:23,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:26:23,482 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:26:23,726 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:26:23,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:26:24,503 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:26:24,504 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:26:25,229 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:26:25,230 INFO L312 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-27 20:26:25,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:26:25 BoogieIcfgContainer [2024-11-27 20:26:25,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:26:25,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:26:25,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:26:25,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:26:25,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:26:22" (1/3) ... [2024-11-27 20:26:25,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6e9bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:26:25, skipping insertion in model container [2024-11-27 20:26:25,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:26:23" (2/3) ... [2024-11-27 20:26:25,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6e9bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:26:25, skipping insertion in model container [2024-11-27 20:26:25,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:26:25" (3/3) ... [2024-11-27 20:26:25,247 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2024-11-27 20:26:25,267 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:26:25,269 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_73-funloop_hard_racefree.i that has 2 procedures, 156 locations, 1 initial locations, 20 loop locations, and 38 error locations. [2024-11-27 20:26:25,269 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:26:25,378 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-27 20:26:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 199 transitions, 405 flow [2024-11-27 20:26:25,582 INFO L124 PetriNetUnfolderBase]: 70/329 cut-off events. [2024-11-27 20:26:25,585 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 20:26:25,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 329 events. 70/329 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1967 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2024-11-27 20:26:25,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 199 transitions, 405 flow [2024-11-27 20:26:25,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 199 transitions, 405 flow [2024-11-27 20:26:25,627 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:26:25,643 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;@548ab25b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:26:25,643 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-27 20:26:25,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:26:25,650 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-27 20:26:25,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:26:25,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:25,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-27 20:26:25,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:25,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:25,658 INFO L85 PathProgramCache]: Analyzing trace with hash 28681053, now seen corresponding path program 1 times [2024-11-27 20:26:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:25,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838557884] [2024-11-27 20:26:25,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:25,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:26,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838557884] [2024-11-27 20:26:26,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838557884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:26,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:26,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:26:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744158177] [2024-11-27 20:26:26,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:26,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:26:26,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:26,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:26:26,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:26:26,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-27 20:26:26,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 199 transitions, 405 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:26,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:26,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-27 20:26:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:27,484 INFO L124 PetriNetUnfolderBase]: 1085/3642 cut-off events. [2024-11-27 20:26:27,485 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:26:27,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5704 conditions, 3642 events. 1085/3642 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32597 event pairs, 924 based on Foata normal form. 734/3839 useless extension candidates. Maximal degree in co-relation 5534. Up to 2056 conditions per place. [2024-11-27 20:26:27,531 INFO L140 encePairwiseOnDemand]: 160/199 looper letters, 72 selfloop transitions, 2 changer transitions 0/161 dead transitions. [2024-11-27 20:26:27,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 161 transitions, 477 flow [2024-11-27 20:26:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:26:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:26:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2024-11-27 20:26:27,556 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6231155778894473 [2024-11-27 20:26:27,559 INFO L175 Difference]: Start difference. First operand has 159 places, 199 transitions, 405 flow. Second operand 3 states and 372 transitions. [2024-11-27 20:26:27,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 161 transitions, 477 flow [2024-11-27 20:26:27,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 161 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:26:27,576 INFO L231 Difference]: Finished difference. Result has 159 places, 161 transitions, 339 flow [2024-11-27 20:26:27,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=159, PETRI_TRANSITIONS=161} [2024-11-27 20:26:27,586 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2024-11-27 20:26:27,586 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 161 transitions, 339 flow [2024-11-27 20:26:27,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:27,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:27,587 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 20:26:27,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:26:27,587 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:27,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:27,589 INFO L85 PathProgramCache]: Analyzing trace with hash 889104715, now seen corresponding path program 1 times [2024-11-27 20:26:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547794090] [2024-11-27 20:26:27,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547794090] [2024-11-27 20:26:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547794090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:26:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849946148] [2024-11-27 20:26:27,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:27,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:26:27,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:26:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:28,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:26:28,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:26:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:28,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:26:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:28,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849946148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:26:28,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:26:28,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-27 20:26:28,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113016845] [2024-11-27 20:26:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:26:28,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:26:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:28,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:26:28,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:26:28,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-27 20:26:28,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 161 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:28,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-27 20:26:28,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:29,094 INFO L124 PetriNetUnfolderBase]: 1085/3645 cut-off events. [2024-11-27 20:26:29,095 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:26:29,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 3645 events. 1085/3645 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32624 event pairs, 924 based on Foata normal form. 0/3108 useless extension candidates. Maximal degree in co-relation 5708. Up to 2056 conditions per place. [2024-11-27 20:26:29,126 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 5 changer transitions 0/164 dead transitions. [2024-11-27 20:26:29,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 164 transitions, 505 flow [2024-11-27 20:26:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:26:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:26:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 602 transitions. [2024-11-27 20:26:29,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5041876046901173 [2024-11-27 20:26:29,131 INFO L175 Difference]: Start difference. First operand has 159 places, 161 transitions, 339 flow. Second operand 6 states and 602 transitions. [2024-11-27 20:26:29,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 164 transitions, 505 flow [2024-11-27 20:26:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 164 transitions, 501 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:26:29,138 INFO L231 Difference]: Finished difference. Result has 166 places, 164 transitions, 371 flow [2024-11-27 20:26:29,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=166, PETRI_TRANSITIONS=164} [2024-11-27 20:26:29,139 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 7 predicate places. [2024-11-27 20:26:29,139 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 164 transitions, 371 flow [2024-11-27 20:26:29,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:29,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:29,140 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-27 20:26:29,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:26:29,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-27 20:26:29,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:29,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash 247377629, now seen corresponding path program 2 times [2024-11-27 20:26:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:29,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890729966] [2024-11-27 20:26:29,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:26:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:29,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:26:29,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:26:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 20:26:29,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890729966] [2024-11-27 20:26:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890729966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:29,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:29,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:26:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441677631] [2024-11-27 20:26:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:29,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:26:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:29,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:26:29,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:26:29,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 199 [2024-11-27 20:26:29,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 164 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:29,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:29,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 199 [2024-11-27 20:26:29,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:30,410 INFO L124 PetriNetUnfolderBase]: 1131/3712 cut-off events. [2024-11-27 20:26:30,411 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:26:30,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5891 conditions, 3712 events. 1131/3712 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 33060 event pairs, 924 based on Foata normal form. 0/3215 useless extension candidates. Maximal degree in co-relation 5857. Up to 2052 conditions per place. [2024-11-27 20:26:30,444 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 99 selfloop transitions, 2 changer transitions 0/184 dead transitions. [2024-11-27 20:26:30,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 184 transitions, 613 flow [2024-11-27 20:26:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:26:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:26:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2024-11-27 20:26:30,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5829145728643216 [2024-11-27 20:26:30,449 INFO L175 Difference]: Start difference. First operand has 166 places, 164 transitions, 371 flow. Second operand 3 states and 348 transitions. [2024-11-27 20:26:30,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 184 transitions, 613 flow [2024-11-27 20:26:30,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 184 transitions, 599 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-27 20:26:30,459 INFO L231 Difference]: Finished difference. Result has 165 places, 162 transitions, 357 flow [2024-11-27 20:26:30,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=165, PETRI_TRANSITIONS=162} [2024-11-27 20:26:30,462 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 6 predicate places. [2024-11-27 20:26:30,463 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 162 transitions, 357 flow [2024-11-27 20:26:30,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:30,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:30,464 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-27 20:26:30,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:26:30,465 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:30,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:30,465 INFO L85 PathProgramCache]: Analyzing trace with hash 247377630, now seen corresponding path program 1 times [2024-11-27 20:26:30,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:30,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526280099] [2024-11-27 20:26:30,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:30,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526280099] [2024-11-27 20:26:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526280099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:26:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519965773] [2024-11-27 20:26:30,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:30,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:30,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:30,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:26:30,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:26:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:30,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:26:30,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:26:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:30,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:26:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519965773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:26:31,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:26:31,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-27 20:26:31,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620099782] [2024-11-27 20:26:31,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:26:31,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:26:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:31,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:26:31,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:26:31,024 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-27 20:26:31,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 162 transitions, 357 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:31,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:31,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-27 20:26:31,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:31,800 INFO L124 PetriNetUnfolderBase]: 1085/3627 cut-off events. [2024-11-27 20:26:31,800 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-27 20:26:31,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5751 conditions, 3627 events. 1085/3627 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 32274 event pairs, 924 based on Foata normal form. 6/3121 useless extension candidates. Maximal degree in co-relation 5699. Up to 2056 conditions per place. [2024-11-27 20:26:31,825 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 11 changer transitions 0/168 dead transitions. [2024-11-27 20:26:31,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 559 flow [2024-11-27 20:26:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:26:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 20:26:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1133 transitions. [2024-11-27 20:26:31,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47445561139028475 [2024-11-27 20:26:31,831 INFO L175 Difference]: Start difference. First operand has 165 places, 162 transitions, 357 flow. Second operand 12 states and 1133 transitions. [2024-11-27 20:26:31,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 559 flow [2024-11-27 20:26:31,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 168 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:26:31,837 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 437 flow [2024-11-27 20:26:31,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-11-27 20:26:31,839 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 21 predicate places. [2024-11-27 20:26:31,839 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 437 flow [2024-11-27 20:26:31,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:31,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:31,840 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-27 20:26:31,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:26:32,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:32,045 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:32,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash 331151390, now seen corresponding path program 2 times [2024-11-27 20:26:32,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:32,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228227843] [2024-11-27 20:26:32,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:26:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:32,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:26:32,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:26:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-27 20:26:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:32,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228227843] [2024-11-27 20:26:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228227843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:32,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:26:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044971785] [2024-11-27 20:26:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:32,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:26:32,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:32,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:26:32,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:26:32,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 199 [2024-11-27 20:26:32,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 437 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:32,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 199 [2024-11-27 20:26:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:32,980 INFO L124 PetriNetUnfolderBase]: 1059/3350 cut-off events. [2024-11-27 20:26:32,981 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-27 20:26:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5458 conditions, 3350 events. 1059/3350 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 29691 event pairs, 0 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 5382. Up to 2019 conditions per place. [2024-11-27 20:26:33,022 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 105 selfloop transitions, 2 changer transitions 0/191 dead transitions. [2024-11-27 20:26:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 191 transitions, 697 flow [2024-11-27 20:26:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:26:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:26:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2024-11-27 20:26:33,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5979899497487438 [2024-11-27 20:26:33,026 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 437 flow. Second operand 3 states and 357 transitions. [2024-11-27 20:26:33,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 191 transitions, 697 flow [2024-11-27 20:26:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 191 transitions, 649 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-27 20:26:33,037 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 399 flow [2024-11-27 20:26:33,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2024-11-27 20:26:33,038 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 19 predicate places. [2024-11-27 20:26:33,038 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 399 flow [2024-11-27 20:26:33,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:33,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:33,038 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:26:33,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:26:33,043 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:33,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2145905888, now seen corresponding path program 1 times [2024-11-27 20:26:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449466035] [2024-11-27 20:26:33,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-27 20:26:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449466035] [2024-11-27 20:26:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449466035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:26:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460712216] [2024-11-27 20:26:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:33,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:26:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:33,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:26:33,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:26:33,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 199 [2024-11-27 20:26:33,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:33,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:33,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 199 [2024-11-27 20:26:33,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:34,306 INFO L124 PetriNetUnfolderBase]: 1039/3322 cut-off events. [2024-11-27 20:26:34,307 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-11-27 20:26:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 3322 events. 1039/3322 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 29419 event pairs, 17 based on Foata normal form. 22/2924 useless extension candidates. Maximal degree in co-relation 5377. Up to 1887 conditions per place. [2024-11-27 20:26:34,336 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 125 selfloop transitions, 3 changer transitions 0/212 dead transitions. [2024-11-27 20:26:34,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 212 transitions, 741 flow [2024-11-27 20:26:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:26:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:26:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2024-11-27 20:26:34,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5816582914572864 [2024-11-27 20:26:34,339 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 399 flow. Second operand 4 states and 463 transitions. [2024-11-27 20:26:34,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 212 transitions, 741 flow [2024-11-27 20:26:34,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 212 transitions, 737 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:26:34,347 INFO L231 Difference]: Finished difference. Result has 178 places, 167 transitions, 397 flow [2024-11-27 20:26:34,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=397, PETRI_PLACES=178, PETRI_TRANSITIONS=167} [2024-11-27 20:26:34,349 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 19 predicate places. [2024-11-27 20:26:34,349 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 167 transitions, 397 flow [2024-11-27 20:26:34,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:34,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:34,350 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-11-27 20:26:34,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:26:34,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-27 20:26:34,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2098572031, now seen corresponding path program 1 times [2024-11-27 20:26:34,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:34,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541436328] [2024-11-27 20:26:34,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:26:34,394 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:26:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:26:34,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:26:34,450 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:26:34,451 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-27 20:26:34,453 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-27 20:26:34,454 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-27 20:26:34,454 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-27 20:26:34,454 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-27 20:26:34,454 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2024-11-27 20:26:34,454 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-27 20:26:34,455 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-27 20:26:34,456 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (25 of 50 remaining) [2024-11-27 20:26:34,457 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-27 20:26:34,458 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-27 20:26:34,459 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-27 20:26:34,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-27 20:26:34,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-27 20:26:34,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-27 20:26:34,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-27 20:26:34,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-27 20:26:34,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-27 20:26:34,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-27 20:26:34,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-27 20:26:34,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-27 20:26:34,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-27 20:26:34,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-27 20:26:34,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:26:34,465 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-27 20:26:34,470 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-27 20:26:34,470 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-27 20:26:34,553 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:26:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 262 transitions, 540 flow [2024-11-27 20:26:34,628 INFO L124 PetriNetUnfolderBase]: 113/534 cut-off events. [2024-11-27 20:26:34,628 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:26:34,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 534 events. 113/534 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3494 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 331. Up to 12 conditions per place. [2024-11-27 20:26:34,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 262 transitions, 540 flow [2024-11-27 20:26:34,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 262 transitions, 540 flow [2024-11-27 20:26:34,646 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:26:34,646 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;@548ab25b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:26:34,648 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-27 20:26:34,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:26:34,652 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-27 20:26:34,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:26:34,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:34,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-27 20:26:34,653 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-27 20:26:34,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash 36746461, now seen corresponding path program 1 times [2024-11-27 20:26:34,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:34,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758499658] [2024-11-27 20:26:34,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:34,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758499658] [2024-11-27 20:26:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758499658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:34,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:34,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:26:34,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546066152] [2024-11-27 20:26:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:34,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:26:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:34,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:26:34,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:26:34,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-27 20:26:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 262 transitions, 540 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:34,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:34,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-27 20:26:34,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:45,368 INFO L124 PetriNetUnfolderBase]: 47750/105639 cut-off events. [2024-11-27 20:26:45,369 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-27 20:26:45,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174877 conditions, 105639 events. 47750/105639 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 2995. Compared 1280803 event pairs, 42147 based on Foata normal form. 24746/116387 useless extension candidates. Maximal degree in co-relation 161463. Up to 69120 conditions per place. [2024-11-27 20:26:45,972 INFO L140 encePairwiseOnDemand]: 211/262 looper letters, 96 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-11-27 20:26:45,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 634 flow [2024-11-27 20:26:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:26:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:26:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2024-11-27 20:26:45,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6183206106870229 [2024-11-27 20:26:45,975 INFO L175 Difference]: Start difference. First operand has 209 places, 262 transitions, 540 flow. Second operand 3 states and 486 transitions. [2024-11-27 20:26:45,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 634 flow [2024-11-27 20:26:45,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 211 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:26:45,982 INFO L231 Difference]: Finished difference. Result has 208 places, 211 transitions, 448 flow [2024-11-27 20:26:45,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=208, PETRI_TRANSITIONS=211} [2024-11-27 20:26:45,984 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -1 predicate places. [2024-11-27 20:26:45,984 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 211 transitions, 448 flow [2024-11-27 20:26:45,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:45,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:45,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 20:26:45,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 20:26:45,985 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-27 20:26:45,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1139132625, now seen corresponding path program 1 times [2024-11-27 20:26:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742809600] [2024-11-27 20:26:45,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:46,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:46,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742809600] [2024-11-27 20:26:46,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742809600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:26:46,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374066080] [2024-11-27 20:26:46,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:26:46,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:46,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:46,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:26:46,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:26:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:46,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:26:46,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:26:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:46,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:26:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:26:46,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374066080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:26:46,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:26:46,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-27 20:26:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255782897] [2024-11-27 20:26:46,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:26:46,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:26:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:46,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:26:46,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:26:46,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-27 20:26:46,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 211 transitions, 448 flow. Second operand has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:46,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:46,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-27 20:26:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:55,909 INFO L124 PetriNetUnfolderBase]: 47750/105642 cut-off events. [2024-11-27 20:26:55,909 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-27 20:26:56,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174893 conditions, 105642 events. 47750/105642 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 2995. Compared 1280993 event pairs, 42147 based on Foata normal form. 0/91644 useless extension candidates. Maximal degree in co-relation 174880. Up to 69120 conditions per place. [2024-11-27 20:26:56,493 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 96 selfloop transitions, 5 changer transitions 0/214 dead transitions. [2024-11-27 20:26:56,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 214 transitions, 662 flow [2024-11-27 20:26:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:26:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:26:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 782 transitions. [2024-11-27 20:26:56,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49745547073791346 [2024-11-27 20:26:56,498 INFO L175 Difference]: Start difference. First operand has 208 places, 211 transitions, 448 flow. Second operand 6 states and 782 transitions. [2024-11-27 20:26:56,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 214 transitions, 662 flow [2024-11-27 20:26:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 214 transitions, 658 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:26:56,504 INFO L231 Difference]: Finished difference. Result has 215 places, 214 transitions, 480 flow [2024-11-27 20:26:56,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=214} [2024-11-27 20:26:56,506 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 6 predicate places. [2024-11-27 20:26:56,508 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 214 transitions, 480 flow [2024-11-27 20:26:56,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:56,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:56,509 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-27 20:26:56,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:26:56,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:56,710 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-27 20:26:56,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1355813341, now seen corresponding path program 2 times [2024-11-27 20:26:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644589273] [2024-11-27 20:26:56,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:26:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:56,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:26:56,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:26:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 20:26:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644589273] [2024-11-27 20:26:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644589273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:26:56,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:26:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:26:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227745802] [2024-11-27 20:26:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:26:56,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:26:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:56,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:26:56,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:26:56,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 262 [2024-11-27 20:26:56,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 214 transitions, 480 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:56,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:56,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 262 [2024-11-27 20:26:56,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:27:07,066 INFO L124 PetriNetUnfolderBase]: 49801/108786 cut-off events. [2024-11-27 20:27:07,066 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-11-27 20:27:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181104 conditions, 108786 events. 49801/108786 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 3048. Compared 1311132 event pairs, 42126 based on Foata normal form. 0/95109 useless extension candidates. Maximal degree in co-relation 181069. Up to 69039 conditions per place. [2024-11-27 20:27:07,581 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 145 selfloop transitions, 2 changer transitions 0/256 dead transitions. [2024-11-27 20:27:07,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 256 transitions, 858 flow [2024-11-27 20:27:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:27:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:27:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2024-11-27 20:27:07,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6005089058524173 [2024-11-27 20:27:07,584 INFO L175 Difference]: Start difference. First operand has 215 places, 214 transitions, 480 flow. Second operand 3 states and 472 transitions. [2024-11-27 20:27:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 256 transitions, 858 flow [2024-11-27 20:27:07,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 256 transitions, 844 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-27 20:27:07,591 INFO L231 Difference]: Finished difference. Result has 214 places, 212 transitions, 466 flow [2024-11-27 20:27:07,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=214, PETRI_TRANSITIONS=212} [2024-11-27 20:27:07,592 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 5 predicate places. [2024-11-27 20:27:07,593 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 212 transitions, 466 flow [2024-11-27 20:27:07,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:27:07,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:27:07,593 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-27 20:27:07,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:27:07,594 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-27 20:27:07,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:27:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1355813342, now seen corresponding path program 1 times [2024-11-27 20:27:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:27:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512898018] [2024-11-27 20:27:07,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:27:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:27:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:27:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:27:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:27:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512898018] [2024-11-27 20:27:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512898018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:27:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68693138] [2024-11-27 20:27:07,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:27:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:27:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:27:07,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:27:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6470ca44-36cf-49b6-aebf-5d60c00bc60d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:27:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:27:07,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:27:07,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:27:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:27:07,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:27:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:27:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68693138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:27:08,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:27:08,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-27 20:27:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018090570] [2024-11-27 20:27:08,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:27:08,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:27:08,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:27:08,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:27:08,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:27:08,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-27 20:27:08,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 212 transitions, 466 flow. Second operand has 13 states, 13 states have (on average 114.15384615384616) internal successors, (1484), 13 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:27:08,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:27:08,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-27 20:27:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand