./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/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_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/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_722ea0be-1da7-4036-881b-375ccf6c8d7a/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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:55:51,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:55:51,709 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:55:51,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:55:51,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:55:51,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:55:51,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:55:51,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:55:51,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:55:51,760 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:55:51,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:55:51,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:55:51,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:55:51,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:55:51,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:55:51,762 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:55:51,763 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:55:51,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:55:51,763 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:55:51,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:55:51,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:55:51,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:55:51,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:55:51,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:55:51,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:55:51,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:55:51,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:55:51,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:55:51,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:55:51,767 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_722ea0be-1da7-4036-881b-375ccf6c8d7a/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 -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-28 02:55:52,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:55:52,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:55:52,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:55:52,069 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:55:52,069 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:55:52,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-28 02:55:54,903 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/data/ef75ce8a1/3d29749e461240e1826f6ebdc8387c14/FLAG7bf0c02db [2024-11-28 02:55:55,185 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:55:55,186 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-28 02:55:55,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/data/ef75ce8a1/3d29749e461240e1826f6ebdc8387c14/FLAG7bf0c02db [2024-11-28 02:55:55,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/data/ef75ce8a1/3d29749e461240e1826f6ebdc8387c14 [2024-11-28 02:55:55,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:55:55,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:55:55,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:55:55,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:55:55,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:55:55,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eea8ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55, skipping insertion in model container [2024-11-28 02:55:55,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,242 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:55:55,491 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 02:55:55,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:55:55,510 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:55:55,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:55:55,557 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:55:55,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55 WrapperNode [2024-11-28 02:55:55,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:55:55,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:55:55,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:55:55,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:55:55,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,630 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-11-28 02:55:55,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:55:55,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:55:55,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:55:55,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:55:55,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,648 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,680 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 02:55:55,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,695 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:55:55,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:55:55,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:55:55,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:55:55,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (1/1) ... [2024-11-28 02:55:55,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:55:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:55:55,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:55:55,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:55:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:55:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:55:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:55:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:55:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:55:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:55:55,797 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 02:55:55,921 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:55:55,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:55:56,601 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:55:56,602 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:55:57,149 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:55:57,149 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 02:55:57,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:55:57 BoogieIcfgContainer [2024-11-28 02:55:57,150 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:55:57,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:55:57,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:55:57,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:55:57,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:55:55" (1/3) ... [2024-11-28 02:55:57,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62364669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:55:57, skipping insertion in model container [2024-11-28 02:55:57,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:55:55" (2/3) ... [2024-11-28 02:55:57,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62364669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:55:57, skipping insertion in model container [2024-11-28 02:55:57,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:55:57" (3/3) ... [2024-11-28 02:55:57,159 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-28 02:55:57,181 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:55:57,182 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-1.wvr-bad.c that has 4 procedures, 72 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2024-11-28 02:55:57,183 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:55:57,280 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:55:57,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-11-28 02:55:57,380 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-11-28 02:55:57,384 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:55:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 85 events. 17/85 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-11-28 02:55:57,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-11-28 02:55:57,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-11-28 02:55:57,408 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:55:57,429 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;@2b7dc191, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:55:57,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-28 02:55:57,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:55:57,435 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 02:55:57,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:55:57,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:55:57,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:55:57,436 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:55:57,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:55:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1044581, now seen corresponding path program 1 times [2024-11-28 02:55:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:55:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023011262] [2024-11-28 02:55:57,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:55:57,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:55:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:55:57,772 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 02:55:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:55:57,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023011262] [2024-11-28 02:55:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023011262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:55:57,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:55:57,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 02:55:57,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285904802] [2024-11-28 02:55:57,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:55:57,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:55:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:55:57,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:55:57,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:55:57,833 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:55:57,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 02:55:57,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:55:57,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:55:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:55:59,638 INFO L124 PetriNetUnfolderBase]: 7269/10578 cut-off events. [2024-11-28 02:55:59,638 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-11-28 02:55:59,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20394 conditions, 10578 events. 7269/10578 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70300 event pairs, 5236 based on Foata normal form. 1/5672 useless extension candidates. Maximal degree in co-relation 19706. Up to 9450 conditions per place. [2024-11-28 02:55:59,718 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-28 02:55:59,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-11-28 02:55:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:55:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:55:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-28 02:55:59,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-28 02:55:59,736 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-11-28 02:55:59,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-11-28 02:55:59,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:55:59,757 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-11-28 02:55:59,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-11-28 02:55:59,764 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-11-28 02:55:59,765 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-11-28 02:55:59,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 02:55:59,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:55:59,765 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:55:59,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:55:59,765 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:55:59,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:55:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582, now seen corresponding path program 1 times [2024-11-28 02:55:59,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:55:59,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170449878] [2024-11-28 02:55:59,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:55:59,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:55:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:00,118 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 02:56:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170449878] [2024-11-28 02:56:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170449878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:00,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459830858] [2024-11-28 02:56:00,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:00,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:56:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:00,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:56:00,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:56:00,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:56:00,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 02:56:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:56:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:01,498 INFO L124 PetriNetUnfolderBase]: 7269/10575 cut-off events. [2024-11-28 02:56:01,498 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-28 02:56:01,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20169 conditions, 10575 events. 7269/10575 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70240 event pairs, 5236 based on Foata normal form. 0/5669 useless extension candidates. Maximal degree in co-relation 20144. Up to 9450 conditions per place. [2024-11-28 02:56:01,585 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 48 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-11-28 02:56:01,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 268 flow [2024-11-28 02:56:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:56:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:56:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-28 02:56:01,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-11-28 02:56:01,590 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 155 transitions. [2024-11-28 02:56:01,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 268 flow [2024-11-28 02:56:01,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:01,594 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 168 flow [2024-11-28 02:56:01,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-28 02:56:01,596 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-28 02:56:01,596 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 168 flow [2024-11-28 02:56:01,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 02:56:01,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:01,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:01,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:56:01,597 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:01,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1757299587, now seen corresponding path program 1 times [2024-11-28 02:56:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:01,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444558820] [2024-11-28 02:56:01,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:01,794 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 02:56:01,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:01,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444558820] [2024-11-28 02:56:01,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444558820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:01,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:01,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 02:56:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725363168] [2024-11-28 02:56:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:01,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:01,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:01,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:01,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:01,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 02:56:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:03,713 INFO L124 PetriNetUnfolderBase]: 12116/17661 cut-off events. [2024-11-28 02:56:03,713 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-28 02:56:03,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33711 conditions, 17661 events. 12116/17661 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 122542 event pairs, 4256 based on Foata normal form. 350/10091 useless extension candidates. Maximal degree in co-relation 33680. Up to 9751 conditions per place. [2024-11-28 02:56:03,801 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 90 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2024-11-28 02:56:03,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 432 flow [2024-11-28 02:56:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-28 02:56:03,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-28 02:56:03,806 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 168 flow. Second operand 3 states and 180 transitions. [2024-11-28 02:56:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 432 flow [2024-11-28 02:56:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:56:03,810 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 181 flow [2024-11-28 02:56:03,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-11-28 02:56:03,811 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-28 02:56:03,811 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 181 flow [2024-11-28 02:56:03,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 02:56:03,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:03,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:03,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:56:03,812 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:03,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1358289779, now seen corresponding path program 1 times [2024-11-28 02:56:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278248161] [2024-11-28 02:56:03,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:03,893 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 02:56:03,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:03,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278248161] [2024-11-28 02:56:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278248161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:03,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361502380] [2024-11-28 02:56:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:03,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:03,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:03,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:03,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-28 02:56:03,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 02:56:03,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:03,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-28 02:56:03,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:05,997 INFO L124 PetriNetUnfolderBase]: 15261/21877 cut-off events. [2024-11-28 02:56:05,998 INFO L125 PetriNetUnfolderBase]: For 1277/1301 co-relation queries the response was YES. [2024-11-28 02:56:06,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 21877 events. 15261/21877 cut-off events. For 1277/1301 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 138855 event pairs, 5655 based on Foata normal form. 0/14448 useless extension candidates. Maximal degree in co-relation 10198. Up to 10528 conditions per place. [2024-11-28 02:56:06,113 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-11-28 02:56:06,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 107 transitions, 443 flow [2024-11-28 02:56:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-11-28 02:56:06,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-28 02:56:06,116 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 181 flow. Second operand 3 states and 160 transitions. [2024-11-28 02:56:06,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 107 transitions, 443 flow [2024-11-28 02:56:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:56:06,119 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 200 flow [2024-11-28 02:56:06,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-11-28 02:56:06,120 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2024-11-28 02:56:06,120 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 200 flow [2024-11-28 02:56:06,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 02:56:06,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:06,121 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:06,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:56:06,121 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:06,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1039731882, now seen corresponding path program 1 times [2024-11-28 02:56:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:06,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784900983] [2024-11-28 02:56:06,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:06,255 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 02:56:06,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:06,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784900983] [2024-11-28 02:56:06,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784900983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:06,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968338724] [2024-11-28 02:56:06,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:06,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:06,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:06,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:06,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:06,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 02:56:06,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:06,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:06,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:08,554 INFO L124 PetriNetUnfolderBase]: 19159/28505 cut-off events. [2024-11-28 02:56:08,554 INFO L125 PetriNetUnfolderBase]: For 4681/4845 co-relation queries the response was YES. [2024-11-28 02:56:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60737 conditions, 28505 events. 19159/28505 cut-off events. For 4681/4845 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 195569 event pairs, 7868 based on Foata normal form. 477/19441 useless extension candidates. Maximal degree in co-relation 17559. Up to 12927 conditions per place. [2024-11-28 02:56:08,665 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-28 02:56:08,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 504 flow [2024-11-28 02:56:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-28 02:56:08,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-28 02:56:08,666 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 200 flow. Second operand 3 states and 180 transitions. [2024-11-28 02:56:08,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 504 flow [2024-11-28 02:56:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:08,675 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 208 flow [2024-11-28 02:56:08,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-11-28 02:56:08,676 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2024-11-28 02:56:08,676 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 208 flow [2024-11-28 02:56:08,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 02:56:08,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:08,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:08,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:56:08,677 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:08,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2128047873, now seen corresponding path program 1 times [2024-11-28 02:56:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:08,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383163699] [2024-11-28 02:56:08,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:08,731 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 02:56:08,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:08,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383163699] [2024-11-28 02:56:08,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383163699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:08,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:08,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136881001] [2024-11-28 02:56:08,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:08,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:08,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:08,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:08,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:08,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:56:08,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:56:08,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:08,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:56:08,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:11,277 INFO L124 PetriNetUnfolderBase]: 23767/34263 cut-off events. [2024-11-28 02:56:11,277 INFO L125 PetriNetUnfolderBase]: For 4327/4741 co-relation queries the response was YES. [2024-11-28 02:56:11,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 34263 events. 23767/34263 cut-off events. For 4327/4741 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 225786 event pairs, 11883 based on Foata normal form. 0/23383 useless extension candidates. Maximal degree in co-relation 25449. Up to 20195 conditions per place. [2024-11-28 02:56:11,390 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-11-28 02:56:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 493 flow [2024-11-28 02:56:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-28 02:56:11,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-28 02:56:11,391 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 208 flow. Second operand 3 states and 168 transitions. [2024-11-28 02:56:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 493 flow [2024-11-28 02:56:11,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:56:11,396 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 224 flow [2024-11-28 02:56:11,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-11-28 02:56:11,396 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-28 02:56:11,397 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 224 flow [2024-11-28 02:56:11,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:56:11,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:11,397 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:11,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:56:11,397 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:11,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 487673179, now seen corresponding path program 1 times [2024-11-28 02:56:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020529131] [2024-11-28 02:56:11,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:11,512 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 02:56:11,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:11,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020529131] [2024-11-28 02:56:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020529131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:11,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746811638] [2024-11-28 02:56:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:11,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:56:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:11,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:56:11,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:56:11,525 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:11,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 02:56:11,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:11,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:11,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:14,151 INFO L124 PetriNetUnfolderBase]: 21337/31717 cut-off events. [2024-11-28 02:56:14,151 INFO L125 PetriNetUnfolderBase]: For 9783/10485 co-relation queries the response was YES. [2024-11-28 02:56:14,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70146 conditions, 31717 events. 21337/31717 cut-off events. For 9783/10485 co-relation queries the response was YES. Maximal size of possible extension queue 1403. Compared 214056 event pairs, 16426 based on Foata normal form. 112/21798 useless extension candidates. Maximal degree in co-relation 42084. Up to 26815 conditions per place. [2024-11-28 02:56:14,307 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 87 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-28 02:56:14,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 498 flow [2024-11-28 02:56:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:56:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:56:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-11-28 02:56:14,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-28 02:56:14,309 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 224 flow. Second operand 5 states and 232 transitions. [2024-11-28 02:56:14,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 498 flow [2024-11-28 02:56:14,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:14,325 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 288 flow [2024-11-28 02:56:14,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-11-28 02:56:14,326 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-28 02:56:14,326 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 288 flow [2024-11-28 02:56:14,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 02:56:14,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:14,326 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:14,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:56:14,327 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:14,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:14,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2061998497, now seen corresponding path program 1 times [2024-11-28 02:56:14,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:14,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584077133] [2024-11-28 02:56:14,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:14,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:14,385 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 02:56:14,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584077133] [2024-11-28 02:56:14,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584077133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:14,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:14,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646185129] [2024-11-28 02:56:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:14,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:14,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:14,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:14,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:56:14,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 02:56:14,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:14,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:56:14,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:18,772 INFO L124 PetriNetUnfolderBase]: 37217/53369 cut-off events. [2024-11-28 02:56:18,772 INFO L125 PetriNetUnfolderBase]: For 13027/14211 co-relation queries the response was YES. [2024-11-28 02:56:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119813 conditions, 53369 events. 37217/53369 cut-off events. For 13027/14211 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 357507 event pairs, 21948 based on Foata normal form. 0/36562 useless extension candidates. Maximal degree in co-relation 117440. Up to 24963 conditions per place. [2024-11-28 02:56:18,972 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 101 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-28 02:56:18,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 609 flow [2024-11-28 02:56:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-28 02:56:18,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-28 02:56:18,977 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 288 flow. Second operand 3 states and 168 transitions. [2024-11-28 02:56:18,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 609 flow [2024-11-28 02:56:18,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:56:18,990 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 312 flow [2024-11-28 02:56:18,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-11-28 02:56:18,991 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-11-28 02:56:18,991 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 312 flow [2024-11-28 02:56:18,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 02:56:18,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:18,991 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:18,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:56:18,992 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:18,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 981408421, now seen corresponding path program 1 times [2024-11-28 02:56:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459330611] [2024-11-28 02:56:18,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:56:19,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459330611] [2024-11-28 02:56:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459330611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:56:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019196576] [2024-11-28 02:56:19,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:19,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:56:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:56:19,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:56:19,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:56:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:19,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:56:19,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:56:19,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:56:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:56:19,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 02:56:19,963 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:56:19,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 02:56:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:56:20,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 02:56:20,025 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:56:20,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:56:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:56:20,121 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:56:20,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019196576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:20,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:56:20,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-28 02:56:20,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236381966] [2024-11-28 02:56:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:20,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:56:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:20,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:56:20,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:56:20,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:56:20,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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 02:56:20,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:20,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:56:20,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:22,822 INFO L124 PetriNetUnfolderBase]: 18923/28899 cut-off events. [2024-11-28 02:56:22,822 INFO L125 PetriNetUnfolderBase]: For 11963/13211 co-relation queries the response was YES. [2024-11-28 02:56:22,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64365 conditions, 28899 events. 18923/28899 cut-off events. For 11963/13211 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 197566 event pairs, 14916 based on Foata normal form. 1455/22710 useless extension candidates. Maximal degree in co-relation 62224. Up to 25014 conditions per place. [2024-11-28 02:56:22,919 INFO L140 encePairwiseOnDemand]: 78/88 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-28 02:56:22,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 400 flow [2024-11-28 02:56:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:56:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:56:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-28 02:56:22,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-28 02:56:22,920 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 312 flow. Second operand 4 states and 152 transitions. [2024-11-28 02:56:22,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 400 flow [2024-11-28 02:56:22,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:22,929 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 280 flow [2024-11-28 02:56:22,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-28 02:56:22,930 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2024-11-28 02:56:22,930 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 280 flow [2024-11-28 02:56:22,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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 02:56:22,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:22,931 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:22,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:56:23,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:56:23,135 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:23,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 887355983, now seen corresponding path program 1 times [2024-11-28 02:56:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:23,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537818616] [2024-11-28 02:56:23,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:23,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:56:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:23,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537818616] [2024-11-28 02:56:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537818616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:23,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:23,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:23,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700273000] [2024-11-28 02:56:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:23,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:23,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:23,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:23,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:23,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:23,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 02:56:23,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:23,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:23,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:26,229 INFO L124 PetriNetUnfolderBase]: 24419/36140 cut-off events. [2024-11-28 02:56:26,229 INFO L125 PetriNetUnfolderBase]: For 12706/14987 co-relation queries the response was YES. [2024-11-28 02:56:26,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81513 conditions, 36140 events. 24419/36140 cut-off events. For 12706/14987 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 232576 event pairs, 8589 based on Foata normal form. 732/28082 useless extension candidates. Maximal degree in co-relation 79370. Up to 23607 conditions per place. [2024-11-28 02:56:26,428 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 87 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-11-28 02:56:26,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 551 flow [2024-11-28 02:56:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-28 02:56:26,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-28 02:56:26,429 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 280 flow. Second operand 3 states and 162 transitions. [2024-11-28 02:56:26,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 551 flow [2024-11-28 02:56:26,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:26,438 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-11-28 02:56:26,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-11-28 02:56:26,442 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -2 predicate places. [2024-11-28 02:56:26,442 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-11-28 02:56:26,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 02:56:26,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:26,443 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:26,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 02:56:26,443 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:26,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash 925029414, now seen corresponding path program 1 times [2024-11-28 02:56:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:26,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305469995] [2024-11-28 02:56:26,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:26,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:26,533 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 02:56:26,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:26,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305469995] [2024-11-28 02:56:26,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305469995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:26,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:56:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962469192] [2024-11-28 02:56:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:26,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:26,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:26,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:26,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:26,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 02:56:26,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:26,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:29,712 INFO L124 PetriNetUnfolderBase]: 24429/36212 cut-off events. [2024-11-28 02:56:29,712 INFO L125 PetriNetUnfolderBase]: For 15382/17681 co-relation queries the response was YES. [2024-11-28 02:56:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84077 conditions, 36212 events. 24429/36212 cut-off events. For 15382/17681 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 234593 event pairs, 8400 based on Foata normal form. 3/27339 useless extension candidates. Maximal degree in co-relation 81936. Up to 29833 conditions per place. [2024-11-28 02:56:29,838 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 64 selfloop transitions, 2 changer transitions 11/97 dead transitions. [2024-11-28 02:56:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 495 flow [2024-11-28 02:56:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-28 02:56:29,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-28 02:56:29,839 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 3 states and 148 transitions. [2024-11-28 02:56:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 495 flow [2024-11-28 02:56:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:56:29,847 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 265 flow [2024-11-28 02:56:29,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-28 02:56:29,848 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2024-11-28 02:56:29,848 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 265 flow [2024-11-28 02:56:29,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 02:56:29,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:29,848 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:29,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:56:29,848 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:29,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash 984522394, now seen corresponding path program 1 times [2024-11-28 02:56:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:29,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271242338] [2024-11-28 02:56:29,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:29,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:56:29,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271242338] [2024-11-28 02:56:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271242338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:29,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:29,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:56:29,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123158193] [2024-11-28 02:56:29,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:29,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:56:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:30,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:56:30,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:56:30,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-28 02:56:30,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 02:56:30,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:30,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-28 02:56:30,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:32,441 INFO L124 PetriNetUnfolderBase]: 20685/30931 cut-off events. [2024-11-28 02:56:32,441 INFO L125 PetriNetUnfolderBase]: For 15899/17924 co-relation queries the response was YES. [2024-11-28 02:56:32,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 30931 events. 20685/30931 cut-off events. For 15899/17924 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 203080 event pairs, 16143 based on Foata normal form. 0/24299 useless extension candidates. Maximal degree in co-relation 71975. Up to 27583 conditions per place. [2024-11-28 02:56:32,783 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 49 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-28 02:56:32,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 361 flow [2024-11-28 02:56:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:56:32,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:56:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-28 02:56:32,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-28 02:56:32,785 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 265 flow. Second operand 4 states and 144 transitions. [2024-11-28 02:56:32,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 361 flow [2024-11-28 02:56:32,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 345 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-28 02:56:32,796 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 247 flow [2024-11-28 02:56:32,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-28 02:56:32,799 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-28 02:56:32,800 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 247 flow [2024-11-28 02:56:32,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 02:56:32,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:32,800 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:32,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:56:32,801 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:32,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 984522395, now seen corresponding path program 1 times [2024-11-28 02:56:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698622798] [2024-11-28 02:56:32,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:56:32,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:32,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698622798] [2024-11-28 02:56:32,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698622798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:32,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:32,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:56:32,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884828620] [2024-11-28 02:56:32,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:32,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:56:32,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:32,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:56:32,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:56:32,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:32,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 02:56:32,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:32,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:32,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:36,390 INFO L124 PetriNetUnfolderBase]: 26934/40836 cut-off events. [2024-11-28 02:56:36,390 INFO L125 PetriNetUnfolderBase]: For 19343/21806 co-relation queries the response was YES. [2024-11-28 02:56:36,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93644 conditions, 40836 events. 26934/40836 cut-off events. For 19343/21806 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 277668 event pairs, 21455 based on Foata normal form. 340/32270 useless extension candidates. Maximal degree in co-relation 93608. Up to 27587 conditions per place. [2024-11-28 02:56:36,527 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 84 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-11-28 02:56:36,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 561 flow [2024-11-28 02:56:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:56:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:56:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-28 02:56:36,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-11-28 02:56:36,529 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 247 flow. Second operand 5 states and 222 transitions. [2024-11-28 02:56:36,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 561 flow [2024-11-28 02:56:36,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:56:36,535 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 293 flow [2024-11-28 02:56:36,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-11-28 02:56:36,536 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-28 02:56:36,536 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 293 flow [2024-11-28 02:56:36,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 02:56:36,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:36,536 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:36,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:56:36,537 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:36,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:36,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1233283775, now seen corresponding path program 1 times [2024-11-28 02:56:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:36,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124870950] [2024-11-28 02:56:36,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:36,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:56:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124870950] [2024-11-28 02:56:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124870950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:36,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:56:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:56:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546459838] [2024-11-28 02:56:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:36,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:56:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:36,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:56:36,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:56:36,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-28 02:56:36,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 02:56:36,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:36,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-28 02:56:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:56:40,453 INFO L124 PetriNetUnfolderBase]: 29449/42288 cut-off events. [2024-11-28 02:56:40,453 INFO L125 PetriNetUnfolderBase]: For 19647/22006 co-relation queries the response was YES. [2024-11-28 02:56:40,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100510 conditions, 42288 events. 29449/42288 cut-off events. For 19647/22006 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 249562 event pairs, 15757 based on Foata normal form. 474/35675 useless extension candidates. Maximal degree in co-relation 100467. Up to 26799 conditions per place. [2024-11-28 02:56:40,621 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 81 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-11-28 02:56:40,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 542 flow [2024-11-28 02:56:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:56:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:56:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2024-11-28 02:56:40,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-28 02:56:40,623 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 293 flow. Second operand 3 states and 144 transitions. [2024-11-28 02:56:40,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 542 flow [2024-11-28 02:56:40,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:56:40,637 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 319 flow [2024-11-28 02:56:40,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2024-11-28 02:56:40,639 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-11-28 02:56:40,639 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 319 flow [2024-11-28 02:56:40,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 02:56:40,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:56:40,639 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:56:40,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 02:56:40,640 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-28 02:56:40,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:56:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1249465946, now seen corresponding path program 1 times [2024-11-28 02:56:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:56:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230243325] [2024-11-28 02:56:40,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:40,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:56:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:56:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:56:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230243325] [2024-11-28 02:56:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230243325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:56:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933103361] [2024-11-28 02:56:40,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:56:40,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:56:40,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:56:40,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:56:40,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_722ea0be-1da7-4036-881b-375ccf6c8d7a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:56:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:56:41,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:56:41,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:56:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:56:41,208 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:56:41,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933103361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:56:41,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:56:41,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-28 02:56:41,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962040278] [2024-11-28 02:56:41,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:56:41,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:56:41,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:56:41,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:56:41,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:56:41,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-28 02:56:41,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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 02:56:41,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:56:41,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-28 02:56:41,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand