./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --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_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/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_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/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_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:38:33,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:38:33,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:38:33,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:38:33,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:38:33,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:38:33,681 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:38:33,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:38:33,682 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:38:33,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:38:33,684 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:38:33,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:38:33,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:38:33,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:38:33,684 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:38:33,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:38:33,685 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:38:33,686 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:38:33,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:38:33,686 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:38:33,686 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:38:33,686 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:38:33,687 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:38:33,687 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:38:33,687 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:38:33,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:38:33,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:38:33,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:38:33,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:38:33,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:38:33,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:38:33,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:38:33,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:38:33,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:38:33,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:38:33,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:38:33,690 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_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/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 -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2024-11-28 04:38:34,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:38:34,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:38:34,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:38:34,032 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:38:34,032 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:38:34,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-11-28 04:38:36,988 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/data/e4a943d16/5a8509bd8e4f40af975c8ab8fa9cf8fd/FLAG4df80437d [2024-11-28 04:38:37,326 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:38:37,326 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-11-28 04:38:37,333 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/data/e4a943d16/5a8509bd8e4f40af975c8ab8fa9cf8fd/FLAG4df80437d [2024-11-28 04:38:37,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/data/e4a943d16/5a8509bd8e4f40af975c8ab8fa9cf8fd [2024-11-28 04:38:37,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:38:37,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:38:37,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:38:37,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:38:37,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:38:37,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6525ec1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37, skipping insertion in model container [2024-11-28 04:38:37,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,375 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:38:37,582 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:38:37,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:38:37,597 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:38:37,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:38:37,641 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:38:37,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37 WrapperNode [2024-11-28 04:38:37,642 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:38:37,643 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:38:37,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:38:37,643 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:38:37,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,687 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 292 [2024-11-28 04:38:37,687 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:38:37,688 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:38:37,688 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:38:37,688 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:38:37,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,701 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,718 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 04:38:37,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,728 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:38:37,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:38:37,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:38:37,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:38:37,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (1/1) ... [2024-11-28 04:38:37,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:38:37,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:38:37,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:38:37,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:38:37,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:38:37,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:38:37,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:38:37,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-28 04:38:37,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:38:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:38:37,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:38:37,831 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:38:37,973 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:38:37,975 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:38:38,696 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:38:38,697 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:38:39,240 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:38:39,240 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 04:38:39,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:38:39 BoogieIcfgContainer [2024-11-28 04:38:39,242 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:38:39,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:38:39,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:38:39,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:38:39,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:38:37" (1/3) ... [2024-11-28 04:38:39,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db31ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:38:39, skipping insertion in model container [2024-11-28 04:38:39,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:37" (2/3) ... [2024-11-28 04:38:39,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db31ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:38:39, skipping insertion in model container [2024-11-28 04:38:39,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:38:39" (3/3) ... [2024-11-28 04:38:39,251 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2024-11-28 04:38:39,271 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:38:39,273 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-parallel-sum-1.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 5 loop locations, and 12 error locations. [2024-11-28 04:38:39,274 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:38:39,380 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-28 04:38:39,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 67 transitions, 162 flow [2024-11-28 04:38:39,476 INFO L124 PetriNetUnfolderBase]: 9/63 cut-off events. [2024-11-28 04:38:39,481 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:38:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 9/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-28 04:38:39,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 67 transitions, 162 flow [2024-11-28 04:38:39,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 148 flow [2024-11-28 04:38:39,505 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:38:39,516 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;@7a123283, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:38:39,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-28 04:38:39,556 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:38:39,557 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 04:38:39,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:38:39,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:38:39,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:38:39,558 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:38:39,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:38:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 878930, now seen corresponding path program 1 times [2024-11-28 04:38:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:38:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950387165] [2024-11-28 04:38:39,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:38:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:38:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:38:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:38:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950387165] [2024-11-28 04:38:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950387165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:38:39,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:38:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:38:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76046924] [2024-11-28 04:38:39,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:38:39,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:38:39,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:38:39,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:38:39,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:38:39,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-11-28 04:38:39,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-28 04:38:39,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:38:39,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-11-28 04:38:39,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:38:46,839 INFO L124 PetriNetUnfolderBase]: 52585/68171 cut-off events. [2024-11-28 04:38:46,839 INFO L125 PetriNetUnfolderBase]: For 2931/2931 co-relation queries the response was YES. [2024-11-28 04:38:47,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138723 conditions, 68171 events. 52585/68171 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 380011 event pairs, 45974 based on Foata normal form. 1/48215 useless extension candidates. Maximal degree in co-relation 131525. Up to 68084 conditions per place. [2024-11-28 04:38:47,415 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-28 04:38:47,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 232 flow [2024-11-28 04:38:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:38:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:38:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-11-28 04:38:47,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43781094527363185 [2024-11-28 04:38:47,436 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 148 flow. Second operand 3 states and 88 transitions. [2024-11-28 04:38:47,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 232 flow [2024-11-28 04:38:47,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 04:38:47,733 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 122 flow [2024-11-28 04:38:47,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-11-28 04:38:47,739 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-28 04:38:47,740 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 122 flow [2024-11-28 04:38:47,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-28 04:38:47,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:38:47,740 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:38:47,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:38:47,740 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:38:47,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:38:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 878931, now seen corresponding path program 1 times [2024-11-28 04:38:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:38:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512982325] [2024-11-28 04:38:47,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:38:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:38:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:38:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:38:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512982325] [2024-11-28 04:38:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512982325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:38:48,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:38:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:38:48,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653584205] [2024-11-28 04:38:48,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:38:48,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:38:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:38:48,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:38:48,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:38:48,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-11-28 04:38:48,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-28 04:38:48,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:38:48,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-11-28 04:38:48,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:38:53,069 INFO L124 PetriNetUnfolderBase]: 52585/68170 cut-off events. [2024-11-28 04:38:53,069 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2024-11-28 04:38:53,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137081 conditions, 68170 events. 52585/68170 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 379810 event pairs, 45974 based on Foata normal form. 0/48214 useless extension candidates. Maximal degree in co-relation 137068. Up to 68084 conditions per place. [2024-11-28 04:38:53,525 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 45 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-28 04:38:53,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 218 flow [2024-11-28 04:38:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:38:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:38:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-28 04:38:53,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35074626865671643 [2024-11-28 04:38:53,530 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 4 states and 94 transitions. [2024-11-28 04:38:53,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 218 flow [2024-11-28 04:38:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:38:53,534 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 124 flow [2024-11-28 04:38:53,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-28 04:38:53,535 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-28 04:38:53,535 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 124 flow [2024-11-28 04:38:53,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-11-28 04:38:53,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:38:53,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:38:53,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:38:53,536 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:38:53,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:38:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 63790951, now seen corresponding path program 1 times [2024-11-28 04:38:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:38:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624180928] [2024-11-28 04:38:53,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:38:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:38:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:38:53,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:38:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624180928] [2024-11-28 04:38:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624180928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:38:53,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:38:53,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:38:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372452393] [2024-11-28 04:38:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:38:53,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:38:53,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:38:53,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:38:53,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:38:53,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-11-28 04:38:53,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-28 04:38:53,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:38:53,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-11-28 04:38:53,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:38:56,211 INFO L124 PetriNetUnfolderBase]: 33332/43282 cut-off events. [2024-11-28 04:38:56,211 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-11-28 04:38:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87080 conditions, 43282 events. 33332/43282 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 229616 event pairs, 28616 based on Foata normal form. 0/33739 useless extension candidates. Maximal degree in co-relation 87065. Up to 43203 conditions per place. [2024-11-28 04:38:56,371 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 43 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-11-28 04:38:56,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 206 flow [2024-11-28 04:38:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:38:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:38:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-28 04:38:56,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34701492537313433 [2024-11-28 04:38:56,373 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 124 flow. Second operand 4 states and 93 transitions. [2024-11-28 04:38:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 206 flow [2024-11-28 04:38:56,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:38:56,375 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 112 flow [2024-11-28 04:38:56,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-11-28 04:38:56,376 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -13 predicate places. [2024-11-28 04:38:56,376 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 112 flow [2024-11-28 04:38:56,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-11-28 04:38:56,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:38:56,376 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:38:56,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:38:56,376 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:38:56,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:38:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 63790952, now seen corresponding path program 1 times [2024-11-28 04:38:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:38:56,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072866486] [2024-11-28 04:38:56,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:38:56,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:38:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:38:56,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:38:56,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072866486] [2024-11-28 04:38:56,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072866486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:38:56,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:38:56,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:38:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312244741] [2024-11-28 04:38:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:38:56,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:38:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:38:56,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:38:56,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:38:56,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:38:56,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-28 04:38:56,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:38:56,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:38:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:38:59,718 INFO L124 PetriNetUnfolderBase]: 45012/59021 cut-off events. [2024-11-28 04:38:59,718 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-11-28 04:38:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118683 conditions, 59021 events. 45012/59021 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 2092. Compared 331530 event pairs, 39355 based on Foata normal form. 1507/47739 useless extension candidates. Maximal degree in co-relation 86609. Up to 42952 conditions per place. [2024-11-28 04:39:00,078 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 78 selfloop transitions, 3 changer transitions 1/87 dead transitions. [2024-11-28 04:39:00,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 360 flow [2024-11-28 04:39:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:39:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:39:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-28 04:39:00,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503731343283582 [2024-11-28 04:39:00,080 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 112 flow. Second operand 4 states and 135 transitions. [2024-11-28 04:39:00,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 360 flow [2024-11-28 04:39:00,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:39:00,084 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 138 flow [2024-11-28 04:39:00,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-28 04:39:00,085 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-28 04:39:00,086 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 138 flow [2024-11-28 04:39:00,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-28 04:39:00,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:39:00,086 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:00,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:39:00,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:39:00,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash -267869689, now seen corresponding path program 1 times [2024-11-28 04:39:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:39:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272617210] [2024-11-28 04:39:00,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:00,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:39:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:39:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272617210] [2024-11-28 04:39:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272617210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:39:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56416531] [2024-11-28 04:39:00,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:00,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:00,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:39:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:00,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:39:00,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:00,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:00,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56416531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:00,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:39:00,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-28 04:39:00,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680008863] [2024-11-28 04:39:00,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:00,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:39:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:39:00,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:39:00,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:39:00,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:39:00,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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) [2024-11-28 04:39:00,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:39:00,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:39:00,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:39:05,660 INFO L124 PetriNetUnfolderBase]: 56893/74963 cut-off events. [2024-11-28 04:39:05,661 INFO L125 PetriNetUnfolderBase]: For 4800/4800 co-relation queries the response was YES. [2024-11-28 04:39:05,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155499 conditions, 74963 events. 56893/74963 cut-off events. For 4800/4800 co-relation queries the response was YES. Maximal size of possible extension queue 2360. Compared 435804 event pairs, 50289 based on Foata normal form. 1506/60209 useless extension candidates. Maximal degree in co-relation 123426. Up to 42950 conditions per place. [2024-11-28 04:39:05,981 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 78 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-11-28 04:39:05,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 91 transitions, 403 flow [2024-11-28 04:39:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:39:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:39:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-11-28 04:39:05,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37100213219616207 [2024-11-28 04:39:05,983 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 138 flow. Second operand 7 states and 174 transitions. [2024-11-28 04:39:05,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 91 transitions, 403 flow [2024-11-28 04:39:05,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:39:05,990 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 191 flow [2024-11-28 04:39:05,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-11-28 04:39:05,991 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-28 04:39:05,991 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 191 flow [2024-11-28 04:39:05,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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) [2024-11-28 04:39:05,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:39:05,991 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:06,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:39:06,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:06,192 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:39:06,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1654561460, now seen corresponding path program 1 times [2024-11-28 04:39:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:39:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948008911] [2024-11-28 04:39:06,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:39:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:06,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:39:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948008911] [2024-11-28 04:39:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948008911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:06,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:39:06,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987267036] [2024-11-28 04:39:06,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:06,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:39:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:39:06,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:39:06,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:39:06,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:39:06,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-28 04:39:06,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:39:06,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:39:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:39:10,323 INFO L124 PetriNetUnfolderBase]: 49569/65350 cut-off events. [2024-11-28 04:39:10,323 INFO L125 PetriNetUnfolderBase]: For 7732/7732 co-relation queries the response was YES. [2024-11-28 04:39:10,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141014 conditions, 65350 events. 49569/65350 cut-off events. For 7732/7732 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 377042 event pairs, 43898 based on Foata normal form. 611/51887 useless extension candidates. Maximal degree in co-relation 96536. Up to 59025 conditions per place. [2024-11-28 04:39:10,541 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 49 selfloop transitions, 2 changer transitions 29/85 dead transitions. [2024-11-28 04:39:10,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 419 flow [2024-11-28 04:39:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:39:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:39:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-28 04:39:10,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-11-28 04:39:10,542 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 191 flow. Second operand 4 states and 128 transitions. [2024-11-28 04:39:10,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 419 flow [2024-11-28 04:39:10,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 410 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-28 04:39:10,551 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 185 flow [2024-11-28 04:39:10,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-11-28 04:39:10,552 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2024-11-28 04:39:10,552 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 185 flow [2024-11-28 04:39:10,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-28 04:39:10,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:39:10,553 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:10,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:39:10,553 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:39:10,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1166165786, now seen corresponding path program 2 times [2024-11-28 04:39:10,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:39:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124286273] [2024-11-28 04:39:10,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:39:10,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:39:10,574 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:39:10,575 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:39:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:39:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:39:10,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124286273] [2024-11-28 04:39:10,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124286273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:10,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:10,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:39:10,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865170312] [2024-11-28 04:39:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:10,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:39:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:39:10,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:39:10,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:39:10,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:39:10,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-11-28 04:39:10,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:39:10,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:39:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:39:14,090 INFO L124 PetriNetUnfolderBase]: 37613/49370 cut-off events. [2024-11-28 04:39:14,091 INFO L125 PetriNetUnfolderBase]: For 7811/7811 co-relation queries the response was YES. [2024-11-28 04:39:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109001 conditions, 49370 events. 37613/49370 cut-off events. For 7811/7811 co-relation queries the response was YES. Maximal size of possible extension queue 1891. Compared 275037 event pairs, 32760 based on Foata normal form. 0/40129 useless extension candidates. Maximal degree in co-relation 108979. Up to 49251 conditions per place. [2024-11-28 04:39:14,280 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 45 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-28 04:39:14,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 53 transitions, 269 flow [2024-11-28 04:39:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:39:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:39:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-28 04:39:14,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34701492537313433 [2024-11-28 04:39:14,282 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 185 flow. Second operand 4 states and 93 transitions. [2024-11-28 04:39:14,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 53 transitions, 269 flow [2024-11-28 04:39:14,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 261 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 04:39:14,302 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 171 flow [2024-11-28 04:39:14,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-11-28 04:39:14,304 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-28 04:39:14,304 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 171 flow [2024-11-28 04:39:14,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-11-28 04:39:14,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:39:14,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:14,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:39:14,305 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:39:14,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1628684181, now seen corresponding path program 1 times [2024-11-28 04:39:14,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:39:14,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781790643] [2024-11-28 04:39:14,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:39:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:14,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:39:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781790643] [2024-11-28 04:39:14,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781790643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:39:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267915003] [2024-11-28 04:39:14,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:14,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:14,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:14,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:14,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:39:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:14,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:39:14,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:14,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:39:14,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267915003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:14,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:39:14,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-28 04:39:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660411571] [2024-11-28 04:39:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:14,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:39:14,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:39:14,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:39:14,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:39:14,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:39:14,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2024-11-28 04:39:14,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:39:14,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:39:14,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:39:17,743 INFO L124 PetriNetUnfolderBase]: 29978/39446 cut-off events. [2024-11-28 04:39:17,743 INFO L125 PetriNetUnfolderBase]: For 7524/7524 co-relation queries the response was YES. [2024-11-28 04:39:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87131 conditions, 39446 events. 29978/39446 cut-off events. For 7524/7524 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 213810 event pairs, 26084 based on Foata normal form. 611/33081 useless extension candidates. Maximal degree in co-relation 74626. Up to 33163 conditions per place. [2024-11-28 04:39:17,922 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 66 selfloop transitions, 7 changer transitions 4/82 dead transitions. [2024-11-28 04:39:17,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 393 flow [2024-11-28 04:39:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:39:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:39:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-11-28 04:39:17,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35181236673773986 [2024-11-28 04:39:17,924 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 171 flow. Second operand 7 states and 165 transitions. [2024-11-28 04:39:17,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 393 flow [2024-11-28 04:39:17,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 385 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 04:39:17,938 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 186 flow [2024-11-28 04:39:17,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2024-11-28 04:39:17,939 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2024-11-28 04:39:17,939 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 186 flow [2024-11-28 04:39:17,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2024-11-28 04:39:17,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:39:17,940 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:17,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:18,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd9f6d86-adb0-41b2-a073-5dc33cd650f6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:18,140 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:39:18,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1764544458, now seen corresponding path program 2 times [2024-11-28 04:39:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:39:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749113920] [2024-11-28 04:39:18,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:39:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:39:18,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:39:18,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:39:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:39:18,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:39:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749113920] [2024-11-28 04:39:18,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749113920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:18,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:18,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:39:18,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746744225] [2024-11-28 04:39:18,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:18,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:39:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:39:18,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:39:18,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:39:18,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-11-28 04:39:18,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-28 04:39:18,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:39:18,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-11-28 04:39:18,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand