./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/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_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:35:29,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:35:29,866 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:35:29,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:35:29,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:35:29,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:35:29,908 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:35:29,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:35:29,909 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:35:29,909 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:35:29,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:35:29,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:35:29,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:35:29,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:35:29,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:35:29,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:35:29,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:35:29,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:35:29,913 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:35:29,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:35:29,913 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:35:29,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:35:29,914 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:35:29,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:35:29,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:35:29,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:35:29,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:35:29,916 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:35:29,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:35:29,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:35:29,917 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_3b60a2f9-3076-4665-b85d-98ad1f061a17/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 ! call(reach_error())) ) 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 -> 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 [2024-11-28 04:35:30,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:35:30,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:35:30,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:35:30,229 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:35:30,229 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:35:30,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-28 04:35:33,240 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/data/e4c97f8b0/a671038da320496492f25af2838ff524/FLAG1e280cc90 [2024-11-28 04:35:33,595 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:35:33,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-28 04:35:33,627 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/data/e4c97f8b0/a671038da320496492f25af2838ff524/FLAG1e280cc90 [2024-11-28 04:35:33,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/data/e4c97f8b0/a671038da320496492f25af2838ff524 [2024-11-28 04:35:33,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:35:33,643 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:35:33,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:35:33,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:35:33,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:35:33,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:35:33" (1/1) ... [2024-11-28 04:35:33,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df1d415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:33, skipping insertion in model container [2024-11-28 04:35:33,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:35:33" (1/1) ... [2024-11-28 04:35:33,699 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:35:34,396 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2024-11-28 04:35:34,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:35:34,416 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:35:34,495 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2024-11-28 04:35:34,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:35:34,624 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:35:34,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34 WrapperNode [2024-11-28 04:35:34,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:35:34,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:35:34,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:35:34,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:35:34,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,699 INFO L138 Inliner]: procedures = 458, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 168 [2024-11-28 04:35:34,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:35:34,700 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:35:34,700 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:35:34,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:35:34,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,747 INFO L175 MemorySlicer]: Split 37 memory accesses to 3 slices as follows [2, 5, 30]. 81 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 3, 8]. The 13 writes are split as follows [0, 1, 12]. [2024-11-28 04:35:34,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,759 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:35:34,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:35:34,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:35:34,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:35:34,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (1/1) ... [2024-11-28 04:35:34,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:35:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:35:34,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:35:34,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:35:34,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:35:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-11-28 04:35:34,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:35:34,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:35:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:35:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:35:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:35:34,859 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:35:35,206 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:35:35,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:35:35,491 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:35:35,492 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:35:35,732 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:35:35,733 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-28 04:35:35,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:35:35 BoogieIcfgContainer [2024-11-28 04:35:35,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:35:35,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:35:35,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:35:35,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:35:35,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:35:33" (1/3) ... [2024-11-28 04:35:35,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36621ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:35:35, skipping insertion in model container [2024-11-28 04:35:35,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:35:34" (2/3) ... [2024-11-28 04:35:35,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36621ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:35:35, skipping insertion in model container [2024-11-28 04:35:35,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:35:35" (3/3) ... [2024-11-28 04:35:35,746 INFO L128 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-11-28 04:35:35,760 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:35:35,761 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safestack_relacy.i that has 2 procedures, 49 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2024-11-28 04:35:35,764 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:35:35,841 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-28 04:35:35,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 61 transitions, 129 flow [2024-11-28 04:35:35,935 INFO L124 PetriNetUnfolderBase]: 12/65 cut-off events. [2024-11-28 04:35:35,939 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:35:35,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 12/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-11-28 04:35:35,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 61 transitions, 129 flow [2024-11-28 04:35:35,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 59 transitions, 122 flow [2024-11-28 04:35:35,959 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:35:35,979 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=LoopHeads, 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;@24fb09f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:35:35,979 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 04:35:35,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:35:35,991 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-11-28 04:35:35,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:35:35,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:35,992 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:35,992 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:35:35,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1623096852, now seen corresponding path program 1 times [2024-11-28 04:35:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:36,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242440497] [2024-11-28 04:35:36,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:35:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242440497] [2024-11-28 04:35:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242440497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:35:36,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:35:36,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:35:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867730041] [2024-11-28 04:35:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:35:36,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:35:36,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:36,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:35:36,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:35:36,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-11-28 04:35:36,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2024-11-28 04:35:36,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:36,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-11-28 04:35:36,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:35:36,935 INFO L124 PetriNetUnfolderBase]: 177/393 cut-off events. [2024-11-28 04:35:36,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:35:36,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 393 events. 177/393 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1419 event pairs, 140 based on Foata normal form. 7/304 useless extension candidates. Maximal degree in co-relation 710. Up to 344 conditions per place. [2024-11-28 04:35:36,941 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 45 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-28 04:35:36,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 216 flow [2024-11-28 04:35:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:35:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:35:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-28 04:35:36,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3524590163934426 [2024-11-28 04:35:36,965 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 122 flow. Second operand 4 states and 86 transitions. [2024-11-28 04:35:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 216 flow [2024-11-28 04:35:36,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:35:36,978 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 130 flow [2024-11-28 04:35:36,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-11-28 04:35:36,984 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-11-28 04:35:36,984 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 130 flow [2024-11-28 04:35:36,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2024-11-28 04:35:36,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:36,984 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:36,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:35:36,987 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:35:36,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1689294387, now seen corresponding path program 1 times [2024-11-28 04:35:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084173244] [2024-11-28 04:35:36,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:37,263 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 04:35:37,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084173244] [2024-11-28 04:35:37,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084173244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:35:37,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99712206] [2024-11-28 04:35:37,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:37,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:35:37,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:35:37,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:35:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:37,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:35:37,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:35:37,531 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 04:35:37,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:35:37,580 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 04:35:37,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99712206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:35:37,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:35:37,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 04:35:37,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969818926] [2024-11-28 04:35:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:35:37,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:35:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:37,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:35:37,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:35:37,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 61 [2024-11-28 04:35:37,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:37,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:37,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 61 [2024-11-28 04:35:37,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:35:37,906 INFO L124 PetriNetUnfolderBase]: 177/396 cut-off events. [2024-11-28 04:35:37,907 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:35:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 396 events. 177/396 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1420 event pairs, 140 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 729. Up to 344 conditions per place. [2024-11-28 04:35:37,910 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 47 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-28 04:35:37,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 250 flow [2024-11-28 04:35:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:35:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:35:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-28 04:35:37,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2650273224043716 [2024-11-28 04:35:37,915 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 130 flow. Second operand 6 states and 97 transitions. [2024-11-28 04:35:37,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 250 flow [2024-11-28 04:35:37,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:35:37,919 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 156 flow [2024-11-28 04:35:37,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-28 04:35:37,920 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-11-28 04:35:37,920 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 156 flow [2024-11-28 04:35:37,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:37,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:37,920 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:37,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:35:38,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:38,121 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:35:38,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -31897460, now seen corresponding path program 2 times [2024-11-28 04:35:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806562025] [2024-11-28 04:35:38,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:35:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:38,173 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:35:38,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 04:35:38,173 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:35:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:35:38,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:35:38,212 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:35:38,213 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-28 04:35:38,215 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-28 04:35:38,215 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-28 04:35:38,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:35:38,216 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-28 04:35:38,218 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 04:35:38,218 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-28 04:35:38,275 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:35:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 105 transitions, 226 flow [2024-11-28 04:35:38,300 INFO L124 PetriNetUnfolderBase]: 24/120 cut-off events. [2024-11-28 04:35:38,301 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 04:35:38,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 120 events. 24/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 396 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2024-11-28 04:35:38,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 105 transitions, 226 flow [2024-11-28 04:35:38,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 105 transitions, 226 flow [2024-11-28 04:35:38,307 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:35:38,311 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=LoopHeads, 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;@24fb09f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:35:38,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 04:35:38,321 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:35:38,321 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-28 04:35:38,322 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:35:38,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:38,322 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:38,322 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-28 04:35:38,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 193813836, now seen corresponding path program 1 times [2024-11-28 04:35:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:38,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990109507] [2024-11-28 04:35:38,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:38,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:35:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990109507] [2024-11-28 04:35:38,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990109507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:35:38,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:35:38,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:35:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234585217] [2024-11-28 04:35:38,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:35:38,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:35:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:38,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:35:38,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:35:38,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 105 [2024-11-28 04:35:38,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:38,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:38,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 105 [2024-11-28 04:35:38,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:35:41,218 INFO L124 PetriNetUnfolderBase]: 11750/18199 cut-off events. [2024-11-28 04:35:41,219 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-11-28 04:35:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35516 conditions, 18199 events. 11750/18199 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 109612 event pairs, 9966 based on Foata normal form. 378/14667 useless extension candidates. Maximal degree in co-relation 30873. Up to 17155 conditions per place. [2024-11-28 04:35:41,399 INFO L140 encePairwiseOnDemand]: 92/105 looper letters, 81 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-28 04:35:41,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 384 flow [2024-11-28 04:35:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:35:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:35:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-28 04:35:41,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-28 04:35:41,402 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 226 flow. Second operand 4 states and 150 transitions. [2024-11-28 04:35:41,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 384 flow [2024-11-28 04:35:41,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 04:35:41,405 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 226 flow [2024-11-28 04:35:41,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-11-28 04:35:41,406 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 4 predicate places. [2024-11-28 04:35:41,406 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 226 flow [2024-11-28 04:35:41,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:41,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:41,407 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:41,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:35:41,407 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-28 04:35:41,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -548676292, now seen corresponding path program 1 times [2024-11-28 04:35:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:41,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704238463] [2024-11-28 04:35:41,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:41,616 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 04:35:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704238463] [2024-11-28 04:35:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704238463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:35:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408627875] [2024-11-28 04:35:41,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:35:41,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:35:41,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:35:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:41,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:35:41,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:35:41,834 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 04:35:41,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:35:41,879 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 04:35:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408627875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:35:41,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:35:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 04:35:41,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873820952] [2024-11-28 04:35:41,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:35:41,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:35:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:41,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:35:41,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:35:41,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 105 [2024-11-28 04:35:41,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:41,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:41,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 105 [2024-11-28 04:35:41,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:35:44,129 INFO L124 PetriNetUnfolderBase]: 11750/18202 cut-off events. [2024-11-28 04:35:44,129 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-11-28 04:35:44,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35534 conditions, 18202 events. 11750/18202 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 109506 event pairs, 9966 based on Foata normal form. 1/14293 useless extension candidates. Maximal degree in co-relation 35493. Up to 17155 conditions per place. [2024-11-28 04:35:44,239 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 83 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-11-28 04:35:44,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 418 flow [2024-11-28 04:35:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:35:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:35:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-28 04:35:44,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26825396825396824 [2024-11-28 04:35:44,248 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 226 flow. Second operand 6 states and 169 transitions. [2024-11-28 04:35:44,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 418 flow [2024-11-28 04:35:44,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:35:44,254 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 252 flow [2024-11-28 04:35:44,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-11-28 04:35:44,256 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 9 predicate places. [2024-11-28 04:35:44,256 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 252 flow [2024-11-28 04:35:44,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:44,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:44,257 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:44,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:35:44,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b60a2f9-3076-4665-b85d-98ad1f061a17/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:44,461 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-28 04:35:44,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash -990505140, now seen corresponding path program 2 times [2024-11-28 04:35:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:44,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135829491] [2024-11-28 04:35:44,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:35:44,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:44,522 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:35:44,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 04:35:44,525 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:35:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:35:44,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:35:44,566 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:35:44,567 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-28 04:35:44,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-28 04:35:44,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-28 04:35:44,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-28 04:35:44,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:35:44,568 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-28 04:35:44,569 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-28 04:35:44,569 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-28 04:35:44,645 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 04:35:44,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 325 flow [2024-11-28 04:35:44,687 INFO L124 PetriNetUnfolderBase]: 39/186 cut-off events. [2024-11-28 04:35:44,688 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-28 04:35:44,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 186 events. 39/186 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 760 event pairs, 1 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 148. Up to 12 conditions per place. [2024-11-28 04:35:44,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 325 flow [2024-11-28 04:35:44,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 325 flow [2024-11-28 04:35:44,693 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:35:44,694 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=LoopHeads, 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;@24fb09f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:35:44,694 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-28 04:35:44,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:35:44,700 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2024-11-28 04:35:44,700 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-28 04:35:44,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:44,700 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:44,700 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-28 04:35:44,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -333736715, now seen corresponding path program 1 times [2024-11-28 04:35:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:44,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872719304] [2024-11-28 04:35:44,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:35:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:35:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:35:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872719304] [2024-11-28 04:35:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872719304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:35:44,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:35:44,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:35:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298466224] [2024-11-28 04:35:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:35:44,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:35:44,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:44,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:35:44,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:35:44,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 149 [2024-11-28 04:35:44,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 325 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:44,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:44,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 149 [2024-11-28 04:35:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand