./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC --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 94001a9ab0492f7774a7e81f183179cf0060947b701e48f51b2989eec22ae051 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:25:43,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:25:43,579 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:25:43,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:25:43,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:25:43,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:25:43,636 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:25:43,637 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:25:43,637 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:25:43,638 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:25:43,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:25:43,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:25:43,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:25:43,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:25:43,641 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:25:43,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:25:43,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:25:43,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:25:43,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:25:43,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:25:43,642 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:25:43,642 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:25:43,643 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:25:43,644 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:43,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:25:43,644 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:43,645 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:25:43,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:25:43,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:25:43,647 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:25:43,647 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_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC 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 -> 94001a9ab0492f7774a7e81f183179cf0060947b701e48f51b2989eec22ae051 [2024-11-23 18:25:43,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:25:44,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:25:44,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:25:44,012 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:25:44,013 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:25:44,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/pthread-lit/sssc12.i [2024-11-23 18:25:47,137 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/data/2601a26c3/a376106755484a24b34fa27d6e53e29f/FLAG3d3829545 [2024-11-23 18:25:47,691 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:25:47,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/sv-benchmarks/c/pthread-lit/sssc12.i [2024-11-23 18:25:47,720 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/data/2601a26c3/a376106755484a24b34fa27d6e53e29f/FLAG3d3829545 [2024-11-23 18:25:47,746 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/data/2601a26c3/a376106755484a24b34fa27d6e53e29f [2024-11-23 18:25:47,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:25:47,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:25:47,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:25:47,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:25:47,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:25:47,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:25:47" (1/1) ... [2024-11-23 18:25:47,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567cf1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:47, skipping insertion in model container [2024-11-23 18:25:47,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:25:47" (1/1) ... [2024-11-23 18:25:47,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:25:48,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:25:48,385 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:25:48,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:25:48,508 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:25:48,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48 WrapperNode [2024-11-23 18:25:48,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:25:48,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:25:48,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:25:48,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:25:48,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,555 INFO L138 Inliner]: procedures = 272, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-11-23 18:25:48,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:25:48,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:25:48,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:25:48,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:25:48,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,570 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,599 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-23 18:25:48,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,613 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,620 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:25:48,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:25:48,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:25:48,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:25:48,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (1/1) ... [2024-11-23 18:25:48,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:48,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:25:48,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcf8c39f-e315-45f5-8655-587d82a4e0fa/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:25:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2024-11-23 18:25:48,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2024-11-23 18:25:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-23 18:25:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:25:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:25:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 18:25:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:25:48,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:25:48,712 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:25:48,878 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:25:48,883 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:25:49,173 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:25:49,173 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:25:49,447 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:25:49,447 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 18:25:49,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:25:49 BoogieIcfgContainer [2024-11-23 18:25:49,449 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:25:49,453 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:25:49,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:25:49,459 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:25:49,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:25:47" (1/3) ... [2024-11-23 18:25:49,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4af9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:25:49, skipping insertion in model container [2024-11-23 18:25:49,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:48" (2/3) ... [2024-11-23 18:25:49,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4af9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:25:49, skipping insertion in model container [2024-11-23 18:25:49,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:25:49" (3/3) ... [2024-11-23 18:25:49,462 INFO L128 eAbstractionObserver]: Analyzing ICFG sssc12.i [2024-11-23 18:25:49,480 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:25:49,482 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sssc12.i that has 2 procedures, 23 locations, 1 initial locations, 2 loop locations, and 4 error locations. [2024-11-23 18:25:49,482 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:25:49,535 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 18:25:49,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 26 transitions, 56 flow [2024-11-23 18:25:49,618 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-11-23 18:25:49,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:49,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 3/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-23 18:25:49,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 26 transitions, 56 flow [2024-11-23 18:25:49,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 26 transitions, 56 flow [2024-11-23 18:25:49,637 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:25:49,650 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;@4065fdb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:25:49,651 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-23 18:25:49,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:25:49,655 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-23 18:25:49,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:49,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:49,656 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:49,657 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-23 18:25:49,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:49,666 INFO L85 PathProgramCache]: Analyzing trace with hash 239928, now seen corresponding path program 1 times [2024-11-23 18:25:49,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460960708] [2024-11-23 18:25:49,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:49,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460960708] [2024-11-23 18:25:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460960708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:49,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:49,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94197951] [2024-11-23 18:25:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:49,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:25:49,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:49,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:25:49,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:25:49,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2024-11-23 18:25:49,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2024-11-23 18:25:49,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:49,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2024-11-23 18:25:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:50,064 INFO L124 PetriNetUnfolderBase]: 19/68 cut-off events. [2024-11-23 18:25:50,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:50,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 68 events. 19/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 16 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 108. Up to 49 conditions per place. [2024-11-23 18:25:50,069 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 13 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2024-11-23 18:25:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 70 flow [2024-11-23 18:25:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:25:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 18:25:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-11-23 18:25:50,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-23 18:25:50,089 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 56 flow. Second operand 2 states and 32 transitions. [2024-11-23 18:25:50,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 70 flow [2024-11-23 18:25:50,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 70 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:50,100 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 44 flow [2024-11-23 18:25:50,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-23 18:25:50,108 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2024-11-23 18:25:50,112 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 44 flow [2024-11-23 18:25:50,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2024-11-23 18:25:50,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:50,112 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 18:25:50,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:25:50,113 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-23 18:25:50,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1441871799, now seen corresponding path program 1 times [2024-11-23 18:25:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882300574] [2024-11-23 18:25:50,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:50,184 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 18:25:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:50,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 18:25:50,248 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 18:25:50,250 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-23 18:25:50,252 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2024-11-23 18:25:50,255 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-23 18:25:50,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-11-23 18:25:50,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2024-11-23 18:25:50,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-11-23 18:25:50,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-11-23 18:25:50,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-23 18:25:50,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:25:50,257 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 18:25:50,260 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 18:25:50,260 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-23 18:25:50,318 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 18:25:50,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 45 transitions, 100 flow [2024-11-23 18:25:50,343 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-23 18:25:50,344 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:25:50,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 54 events. 6/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2024-11-23 18:25:50,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 45 transitions, 100 flow [2024-11-23 18:25:50,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 45 transitions, 100 flow [2024-11-23 18:25:50,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:25:50,349 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;@4065fdb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:25:50,349 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-23 18:25:50,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:25:50,355 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-23 18:25:50,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:50,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:50,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:50,357 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-23 18:25:50,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash 284613, now seen corresponding path program 1 times [2024-11-23 18:25:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:50,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247263212] [2024-11-23 18:25:50,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:50,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:50,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247263212] [2024-11-23 18:25:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247263212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:50,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:50,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276500854] [2024-11-23 18:25:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:50,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:25:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:50,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:25:50,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:25:50,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-11-23 18:25:50,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2024-11-23 18:25:50,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:50,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-11-23 18:25:50,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:50,826 INFO L124 PetriNetUnfolderBase]: 505/1053 cut-off events. [2024-11-23 18:25:50,827 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-23 18:25:50,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 1053 events. 505/1053 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5829 event pairs, 412 based on Foata normal form. 126/1041 useless extension candidates. Maximal degree in co-relation 1398. Up to 805 conditions per place. [2024-11-23 18:25:50,848 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 23 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2024-11-23 18:25:50,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 128 flow [2024-11-23 18:25:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:25:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 18:25:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 56 transitions. [2024-11-23 18:25:50,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-11-23 18:25:50,852 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 100 flow. Second operand 2 states and 56 transitions. [2024-11-23 18:25:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 128 flow [2024-11-23 18:25:50,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:50,855 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 82 flow [2024-11-23 18:25:50,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-23 18:25:50,857 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-11-23 18:25:50,858 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 82 flow [2024-11-23 18:25:50,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2024-11-23 18:25:50,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:50,859 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-23 18:25:50,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:25:50,860 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-23 18:25:50,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1961372026, now seen corresponding path program 1 times [2024-11-23 18:25:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006277569] [2024-11-23 18:25:50,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:50,890 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 18:25:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:50,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 18:25:50,933 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 18:25:50,934 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-11-23 18:25:50,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2024-11-23 18:25:50,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2024-11-23 18:25:50,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2024-11-23 18:25:50,934 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2024-11-23 18:25:50,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2024-11-23 18:25:50,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2024-11-23 18:25:50,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2024-11-23 18:25:50,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2024-11-23 18:25:50,935 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2024-11-23 18:25:50,936 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2024-11-23 18:25:50,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 18:25:50,936 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 18:25:50,937 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 18:25:50,937 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-23 18:25:50,985 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 18:25:50,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 64 transitions, 146 flow [2024-11-23 18:25:51,003 INFO L124 PetriNetUnfolderBase]: 9/78 cut-off events. [2024-11-23 18:25:51,003 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 18:25:51,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 78 events. 9/78 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 224 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2024-11-23 18:25:51,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 64 transitions, 146 flow [2024-11-23 18:25:51,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 64 transitions, 146 flow [2024-11-23 18:25:51,008 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:25:51,008 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;@4065fdb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:25:51,009 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-23 18:25:51,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:25:51,012 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-23 18:25:51,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:51,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:51,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:51,012 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 18:25:51,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 348165, now seen corresponding path program 1 times [2024-11-23 18:25:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:51,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442391319] [2024-11-23 18:25:51,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442391319] [2024-11-23 18:25:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442391319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732903806] [2024-11-23 18:25:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:51,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:25:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:51,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:25:51,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:25:51,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 64 [2024-11-23 18:25:51,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-11-23 18:25:51,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:51,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 64 [2024-11-23 18:25:51,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:53,200 INFO L124 PetriNetUnfolderBase]: 8379/13988 cut-off events. [2024-11-23 18:25:53,200 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2024-11-23 18:25:53,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25772 conditions, 13988 events. 8379/13988 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 99863 event pairs, 6822 based on Foata normal form. 1854/13830 useless extension candidates. Maximal degree in co-relation 4138. Up to 11391 conditions per place. [2024-11-23 18:25:53,328 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 33 selfloop transitions, 0 changer transitions 0/52 dead transitions. [2024-11-23 18:25:53,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 188 flow [2024-11-23 18:25:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:25:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 18:25:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-11-23 18:25:53,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-23 18:25:53,330 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 146 flow. Second operand 2 states and 80 transitions. [2024-11-23 18:25:53,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 188 flow [2024-11-23 18:25:53,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 186 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:53,335 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 120 flow [2024-11-23 18:25:53,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-23 18:25:53,337 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-11-23 18:25:53,337 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 120 flow [2024-11-23 18:25:53,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-11-23 18:25:53,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:53,339 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-23 18:25:53,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 18:25:53,339 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 18:25:53,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1713146920, now seen corresponding path program 1 times [2024-11-23 18:25:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262433379] [2024-11-23 18:25:53,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:53,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:53,377 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 18:25:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:25:53,417 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 18:25:53,417 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 18:25:53,417 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2024-11-23 18:25:53,417 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2024-11-23 18:25:53,417 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-11-23 18:25:53,418 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-11-23 18:25:53,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 18:25:53,419 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 18:25:53,419 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-23 18:25:53,419 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-23 18:25:53,476 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-23 18:25:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 194 flow [2024-11-23 18:25:53,490 INFO L124 PetriNetUnfolderBase]: 12/102 cut-off events. [2024-11-23 18:25:53,490 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-23 18:25:53,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 102 events. 12/102 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 328 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 90. Up to 5 conditions per place. [2024-11-23 18:25:53,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 194 flow [2024-11-23 18:25:53,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 194 flow [2024-11-23 18:25:53,496 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:25:53,497 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;@4065fdb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:25:53,499 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-23 18:25:53,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:25:53,501 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-23 18:25:53,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:53,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:53,501 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:53,501 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-23 18:25:53,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:53,502 INFO L85 PathProgramCache]: Analyzing trace with hash 430584, now seen corresponding path program 1 times [2024-11-23 18:25:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058877081] [2024-11-23 18:25:53,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:53,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:53,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058877081] [2024-11-23 18:25:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058877081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480521536] [2024-11-23 18:25:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:53,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:25:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:53,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:25:53,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:25:53,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 83 [2024-11-23 18:25:53,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:53,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:53,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 83 [2024-11-23 18:25:53,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:08,168 INFO L124 PetriNetUnfolderBase]: 116955/173156 cut-off events. [2024-11-23 18:26:08,168 INFO L125 PetriNetUnfolderBase]: For 10796/10796 co-relation queries the response was YES. [2024-11-23 18:26:08,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325157 conditions, 173156 events. 116955/173156 cut-off events. For 10796/10796 co-relation queries the response was YES. Maximal size of possible extension queue 5017. Compared 1407248 event pairs, 95334 based on Foata normal form. 24558/171542 useless extension candidates. Maximal degree in co-relation 25867. Up to 147087 conditions per place. [2024-11-23 18:26:09,330 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 43 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2024-11-23 18:26:09,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 250 flow [2024-11-23 18:26:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:26:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 18:26:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 104 transitions. [2024-11-23 18:26:09,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6265060240963856 [2024-11-23 18:26:09,333 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 194 flow. Second operand 2 states and 104 transitions. [2024-11-23 18:26:09,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 250 flow [2024-11-23 18:26:09,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 244 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-23 18:26:09,351 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 158 flow [2024-11-23 18:26:09,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=158, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-23 18:26:09,353 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, -6 predicate places. [2024-11-23 18:26:09,354 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 158 flow [2024-11-23 18:26:09,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:09,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:09,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:09,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 18:26:09,355 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-23 18:26:09,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 906942034, now seen corresponding path program 1 times [2024-11-23 18:26:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:09,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123003612] [2024-11-23 18:26:09,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:26:09,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123003612] [2024-11-23 18:26:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123003612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:26:09,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:26:09,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:26:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112752720] [2024-11-23 18:26:09,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:26:09,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:26:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:09,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:26:09,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:26:09,571 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 83 [2024-11-23 18:26:09,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 158 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) [2024-11-23 18:26:09,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:09,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 83 [2024-11-23 18:26:09,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:21,857 INFO L124 PetriNetUnfolderBase]: 116955/169955 cut-off events. [2024-11-23 18:26:21,858 INFO L125 PetriNetUnfolderBase]: For 4249/4249 co-relation queries the response was YES. [2024-11-23 18:26:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320059 conditions, 169955 events. 116955/169955 cut-off events. For 4249/4249 co-relation queries the response was YES. Maximal size of possible extension queue 4791. Compared 1329101 event pairs, 95334 based on Foata normal form. 0/146984 useless extension candidates. Maximal degree in co-relation 320052. Up to 147086 conditions per place. [2024-11-23 18:26:23,219 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 42 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2024-11-23 18:26:23,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 236 flow [2024-11-23 18:26:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:26:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:26:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-23 18:26:23,226 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4538152610441767 [2024-11-23 18:26:23,227 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 158 flow. Second operand 3 states and 113 transitions. [2024-11-23 18:26:23,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 236 flow [2024-11-23 18:26:23,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:26:23,244 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 152 flow [2024-11-23 18:26:23,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-11-23 18:26:23,245 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, -8 predicate places. [2024-11-23 18:26:23,246 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 152 flow [2024-11-23 18:26:23,246 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) [2024-11-23 18:26:23,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:23,247 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:23,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 18:26:23,247 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-23 18:26:23,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash 906942035, now seen corresponding path program 1 times [2024-11-23 18:26:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:23,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331812359] [2024-11-23 18:26:23,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:26:23,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:23,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331812359] [2024-11-23 18:26:23,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331812359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:26:23,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:26:23,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:26:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128433891] [2024-11-23 18:26:23,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:26:23,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:26:23,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:23,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:26:23,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:26:24,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 83 [2024-11-23 18:26:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 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) [2024-11-23 18:26:24,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:24,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 83 [2024-11-23 18:26:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand