./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.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_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/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_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/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_b9f532ab-054d-4e5e-80b6-349d1f725d30/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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:23:30,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:23:30,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:23:30,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:23:30,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:23:30,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:23:30,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:23:30,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:23:30,234 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:23:30,235 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:23:30,235 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:23:30,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:23:30,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:23:30,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:23:30,236 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:23:30,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:23:30,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:23:30,236 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:23:30,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:23:30,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:23:30,237 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:23:30,238 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:23:30,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:30,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:30,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:30,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:30,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:30,239 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:23:30,239 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:23:30,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:23:30,241 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/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 -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2024-11-27 23:23:30,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:23:30,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:23:30,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:23:30,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:23:30,594 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:23:30,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2024-11-27 23:23:34,127 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/data/082f51bb5/e648199d1ead46838d31e2af6fb94c18/FLAG5b0b1f661 [2024-11-27 23:23:34,607 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:23:34,608 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2024-11-27 23:23:34,634 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/data/082f51bb5/e648199d1ead46838d31e2af6fb94c18/FLAG5b0b1f661 [2024-11-27 23:23:34,664 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/data/082f51bb5/e648199d1ead46838d31e2af6fb94c18 [2024-11-27 23:23:34,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:23:34,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:23:34,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:34,672 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:23:34,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:23:34,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:34" (1/1) ... [2024-11-27 23:23:34,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174aeba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:34, skipping insertion in model container [2024-11-27 23:23:34,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:23:34" (1/1) ... [2024-11-27 23:23:34,744 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:23:35,291 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-11-27 23:23:35,310 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2024-11-27 23:23:35,320 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2024-11-27 23:23:35,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:35,364 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:23:35,431 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-11-27 23:23:35,433 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2024-11-27 23:23:35,436 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_b9f532ab-054d-4e5e-80b6-349d1f725d30/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2024-11-27 23:23:35,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:23:35,486 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:23:35,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35 WrapperNode [2024-11-27 23:23:35,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:23:35,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:35,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:23:35,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:23:35,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,566 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2024-11-27 23:23:35,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:23:35,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:23:35,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:23:35,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:23:35,582 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,586 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,618 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 1, 12, 8]. 52 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [2, 1, 10, 8]. The 1 writes are split as follows [0, 0, 1, 0]. [2024-11-27 23:23:35,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,632 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,640 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:23:35,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:23:35,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:23:35,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:23:35,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (1/1) ... [2024-11-27 23:23:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:23:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:35,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:23:35,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:23:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:23:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:23:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 23:23:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 23:23:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-27 23:23:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-27 23:23:35,757 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:23:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 23:23:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-27 23:23:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:23:35,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:23:35,763 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:23:35,994 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:23:35,996 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:23:36,371 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:23:36,371 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:23:36,677 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:23:36,677 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 23:23:36,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:36 BoogieIcfgContainer [2024-11-27 23:23:36,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:23:36,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:23:36,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:23:36,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:23:36,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:23:34" (1/3) ... [2024-11-27 23:23:36,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb1ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:36, skipping insertion in model container [2024-11-27 23:23:36,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:23:35" (2/3) ... [2024-11-27 23:23:36,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb1ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:23:36, skipping insertion in model container [2024-11-27 23:23:36,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:23:36" (3/3) ... [2024-11-27 23:23:36,690 INFO L128 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-11-27 23:23:36,705 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:23:36,707 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG circular_buffer_ok.i that has 3 procedures, 39 locations, 1 initial locations, 2 loop locations, and 3 error locations. [2024-11-27 23:23:36,708 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:23:36,806 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 23:23:36,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 46 transitions, 106 flow [2024-11-27 23:23:36,918 INFO L124 PetriNetUnfolderBase]: 8/44 cut-off events. [2024-11-27 23:23:36,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:23:36,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 8/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 117 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-27 23:23:36,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 46 transitions, 106 flow [2024-11-27 23:23:36,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 42 transitions, 93 flow [2024-11-27 23:23:36,951 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:23:36,971 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;@4d10bbf0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:23:36,972 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-27 23:23:37,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:23:37,002 INFO L124 PetriNetUnfolderBase]: 8/39 cut-off events. [2024-11-27 23:23:37,003 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-27 23:23:37,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:37,004 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:37,004 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:37,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 576897654, now seen corresponding path program 1 times [2024-11-27 23:23:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113874024] [2024-11-27 23:23:37,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:37,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:37,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113874024] [2024-11-27 23:23:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113874024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:37,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:37,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:23:37,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212007415] [2024-11-27 23:23:37,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:37,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:23:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:37,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:23:37,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:23:37,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:37,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:37,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:37,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:37,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:38,254 INFO L124 PetriNetUnfolderBase]: 393/720 cut-off events. [2024-11-27 23:23:38,255 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-27 23:23:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 720 events. 393/720 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3466 event pairs, 291 based on Foata normal form. 65/706 useless extension candidates. Maximal degree in co-relation 1319. Up to 616 conditions per place. [2024-11-27 23:23:38,264 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 26 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2024-11-27 23:23:38,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 137 flow [2024-11-27 23:23:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-27 23:23:38,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-27 23:23:38,283 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 93 flow. Second operand 3 states and 69 transitions. [2024-11-27 23:23:38,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 137 flow [2024-11-27 23:23:38,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:23:38,293 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 80 flow [2024-11-27 23:23:38,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-27 23:23:38,301 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-27 23:23:38,302 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 80 flow [2024-11-27 23:23:38,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:38,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:38,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:38,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:23:38,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:38,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 703926712, now seen corresponding path program 1 times [2024-11-27 23:23:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412814551] [2024-11-27 23:23:38,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:38,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412814551] [2024-11-27 23:23:38,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412814551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:38,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:38,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:23:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346184921] [2024-11-27 23:23:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:38,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:23:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:38,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:23:38,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:23:38,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:38,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:38,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:38,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:38,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:39,007 INFO L124 PetriNetUnfolderBase]: 557/1028 cut-off events. [2024-11-27 23:23:39,007 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-27 23:23:39,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 1028 events. 557/1028 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4923 event pairs, 153 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1927. Up to 573 conditions per place. [2024-11-27 23:23:39,022 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 44 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-27 23:23:39,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 213 flow [2024-11-27 23:23:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-27 23:23:39,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-11-27 23:23:39,028 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 80 flow. Second operand 3 states and 86 transitions. [2024-11-27 23:23:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 213 flow [2024-11-27 23:23:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:39,032 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 91 flow [2024-11-27 23:23:39,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-27 23:23:39,037 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-11-27 23:23:39,037 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 91 flow [2024-11-27 23:23:39,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:39,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:39,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:39,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:23:39,039 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:39,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2027547551, now seen corresponding path program 1 times [2024-11-27 23:23:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:39,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883179199] [2024-11-27 23:23:39,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883179199] [2024-11-27 23:23:39,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883179199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:23:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015942036] [2024-11-27 23:23:39,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:39,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:23:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:39,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:23:39,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:23:39,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-27 23:23:39,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:39,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:39,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-27 23:23:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:39,634 INFO L124 PetriNetUnfolderBase]: 691/1311 cut-off events. [2024-11-27 23:23:39,635 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-27 23:23:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2518 conditions, 1311 events. 691/1311 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6295 event pairs, 285 based on Foata normal form. 31/1248 useless extension candidates. Maximal degree in co-relation 2510. Up to 572 conditions per place. [2024-11-27 23:23:39,647 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 44 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2024-11-27 23:23:39,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 58 transitions, 234 flow [2024-11-27 23:23:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-27 23:23:39,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-11-27 23:23:39,650 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 91 flow. Second operand 3 states and 90 transitions. [2024-11-27 23:23:39,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 58 transitions, 234 flow [2024-11-27 23:23:39,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:39,656 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 104 flow [2024-11-27 23:23:39,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-27 23:23:39,658 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-11-27 23:23:39,659 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 104 flow [2024-11-27 23:23:39,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:39,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:39,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:39,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:23:39,660 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:39,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2101676173, now seen corresponding path program 1 times [2024-11-27 23:23:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281961560] [2024-11-27 23:23:39,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281961560] [2024-11-27 23:23:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281961560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:39,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:39,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:23:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621008688] [2024-11-27 23:23:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:39,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:39,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:39,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:39,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:39,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:39,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:39,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:40,617 INFO L124 PetriNetUnfolderBase]: 899/1683 cut-off events. [2024-11-27 23:23:40,617 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-11-27 23:23:40,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3399 conditions, 1683 events. 899/1683 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9153 event pairs, 439 based on Foata normal form. 12/1590 useless extension candidates. Maximal degree in co-relation 3389. Up to 1088 conditions per place. [2024-11-27 23:23:40,632 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 78 selfloop transitions, 7 changer transitions 0/94 dead transitions. [2024-11-27 23:23:40,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 94 transitions, 404 flow [2024-11-27 23:23:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:23:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 23:23:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-11-27 23:23:40,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-11-27 23:23:40,639 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 104 flow. Second operand 7 states and 176 transitions. [2024-11-27 23:23:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 94 transitions, 404 flow [2024-11-27 23:23:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 94 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:40,644 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 150 flow [2024-11-27 23:23:40,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-27 23:23:40,646 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-11-27 23:23:40,647 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 150 flow [2024-11-27 23:23:40,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:40,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:40,647 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:40,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:23:40,648 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:40,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 691943577, now seen corresponding path program 1 times [2024-11-27 23:23:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146166929] [2024-11-27 23:23:40,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:40,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146166929] [2024-11-27 23:23:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146166929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:40,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:40,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:23:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282275303] [2024-11-27 23:23:40,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:40,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:23:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:40,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:23:40,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:23:40,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:40,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:40,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:40,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:40,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:41,098 INFO L124 PetriNetUnfolderBase]: 756/1460 cut-off events. [2024-11-27 23:23:41,099 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-27 23:23:41,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3151 conditions, 1460 events. 756/1460 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7237 event pairs, 254 based on Foata normal form. 42/1462 useless extension candidates. Maximal degree in co-relation 3137. Up to 732 conditions per place. [2024-11-27 23:23:41,113 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 43 selfloop transitions, 3 changer transitions 3/59 dead transitions. [2024-11-27 23:23:41,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 283 flow [2024-11-27 23:23:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-11-27 23:23:41,119 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-11-27 23:23:41,119 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 150 flow. Second operand 3 states and 82 transitions. [2024-11-27 23:23:41,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 283 flow [2024-11-27 23:23:41,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:41,128 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 156 flow [2024-11-27 23:23:41,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-11-27 23:23:41,129 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-27 23:23:41,129 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 156 flow [2024-11-27 23:23:41,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:41,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:41,129 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:41,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:23:41,129 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:41,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -292795317, now seen corresponding path program 1 times [2024-11-27 23:23:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537119557] [2024-11-27 23:23:41,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:41,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537119557] [2024-11-27 23:23:41,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537119557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:41,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:41,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:23:41,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131314662] [2024-11-27 23:23:41,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:41,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:23:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:41,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:23:41,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:23:41,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-11-27 23:23:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-11-27 23:23:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:41,583 INFO L124 PetriNetUnfolderBase]: 412/908 cut-off events. [2024-11-27 23:23:41,584 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-27 23:23:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 908 events. 412/908 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3981 event pairs, 128 based on Foata normal form. 46/932 useless extension candidates. Maximal degree in co-relation 2007. Up to 410 conditions per place. [2024-11-27 23:23:41,590 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 39 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-27 23:23:41,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 276 flow [2024-11-27 23:23:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-27 23:23:41,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-11-27 23:23:41,593 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 156 flow. Second operand 3 states and 81 transitions. [2024-11-27 23:23:41,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 276 flow [2024-11-27 23:23:41,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:23:41,603 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 158 flow [2024-11-27 23:23:41,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-11-27 23:23:41,605 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-27 23:23:41,606 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 158 flow [2024-11-27 23:23:41,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:41,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:41,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:41,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:23:41,607 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:41,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 33126849, now seen corresponding path program 1 times [2024-11-27 23:23:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190241490] [2024-11-27 23:23:41,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:41,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978173263] [2024-11-27 23:23:41,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:41,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:41,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:23:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:41,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:23:41,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:42,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:42,591 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:42,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:42,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190241490] [2024-11-27 23:23:42,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:23:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978173263] [2024-11-27 23:23:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978173263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:42,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:42,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:23:42,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413167582] [2024-11-27 23:23:42,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:42,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:23:42,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:42,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:23:42,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:23:42,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:42,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:42,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:42,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:42,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:43,199 INFO L124 PetriNetUnfolderBase]: 476/1016 cut-off events. [2024-11-27 23:23:43,199 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2024-11-27 23:23:43,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1016 events. 476/1016 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4354 event pairs, 94 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 2366. Up to 422 conditions per place. [2024-11-27 23:23:43,207 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 71 selfloop transitions, 9 changer transitions 11/103 dead transitions. [2024-11-27 23:23:43,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 515 flow [2024-11-27 23:23:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:23:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 23:23:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-11-27 23:23:43,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-27 23:23:43,210 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 158 flow. Second operand 9 states and 207 transitions. [2024-11-27 23:23:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 515 flow [2024-11-27 23:23:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 103 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:43,215 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 209 flow [2024-11-27 23:23:43,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=209, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-11-27 23:23:43,219 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-27 23:23:43,219 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 209 flow [2024-11-27 23:23:43,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:43,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:43,219 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:43,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:43,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:43,424 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:43,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -554302474, now seen corresponding path program 1 times [2024-11-27 23:23:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:43,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616873491] [2024-11-27 23:23:43,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:43,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616873491] [2024-11-27 23:23:43,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616873491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:43,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:43,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:23:43,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264559001] [2024-11-27 23:23:43,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:43,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:23:43,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:43,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:23:43,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:23:43,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-11-27 23:23:43,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-11-27 23:23:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:43,843 INFO L124 PetriNetUnfolderBase]: 482/1013 cut-off events. [2024-11-27 23:23:43,843 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2024-11-27 23:23:43,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 1013 events. 482/1013 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4359 event pairs, 369 based on Foata normal form. 0/988 useless extension candidates. Maximal degree in co-relation 2446. Up to 828 conditions per place. [2024-11-27 23:23:43,849 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 36 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2024-11-27 23:23:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 48 transitions, 279 flow [2024-11-27 23:23:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:23:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:23:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-27 23:23:43,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-11-27 23:23:43,853 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 209 flow. Second operand 3 states and 64 transitions. [2024-11-27 23:23:43,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 48 transitions, 279 flow [2024-11-27 23:23:43,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 48 transitions, 269 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 23:23:43,858 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 197 flow [2024-11-27 23:23:43,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-11-27 23:23:43,859 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-11-27 23:23:43,861 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 197 flow [2024-11-27 23:23:43,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:43,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:43,862 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:43,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 23:23:43,862 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:43,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1462685277, now seen corresponding path program 1 times [2024-11-27 23:23:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:43,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418942162] [2024-11-27 23:23:43,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418942162] [2024-11-27 23:23:44,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418942162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:44,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:44,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473270300] [2024-11-27 23:23:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:44,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:23:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:44,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:23:44,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:23:44,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-27 23:23:44,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:44,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:44,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-27 23:23:44,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:44,453 INFO L124 PetriNetUnfolderBase]: 513/1053 cut-off events. [2024-11-27 23:23:44,453 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-11-27 23:23:44,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 1053 events. 513/1053 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4341 event pairs, 232 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2547. Up to 582 conditions per place. [2024-11-27 23:23:44,460 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 54 selfloop transitions, 11 changer transitions 5/79 dead transitions. [2024-11-27 23:23:44,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 424 flow [2024-11-27 23:23:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:23:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-11-27 23:23:44,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4963768115942029 [2024-11-27 23:23:44,462 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 197 flow. Second operand 6 states and 137 transitions. [2024-11-27 23:23:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 424 flow [2024-11-27 23:23:44,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:23:44,467 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 221 flow [2024-11-27 23:23:44,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2024-11-27 23:23:44,468 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-11-27 23:23:44,468 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 221 flow [2024-11-27 23:23:44,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:44,468 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:44,468 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:44,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 23:23:44,468 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:23:44,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1922280431, now seen corresponding path program 1 times [2024-11-27 23:23:44,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:44,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012154641] [2024-11-27 23:23:44,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:44,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:23:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048717650] [2024-11-27 23:23:44,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:44,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:44,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:23:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:45,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:23:45,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:45,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-27 23:23:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:46,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:57,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 466 treesize of output 446 [2024-11-27 23:23:57,830 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-27 23:23:57,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 496 treesize of output 427 [2024-11-27 23:24:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012154641] [2024-11-27 23:24:18,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:24:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048717650] [2024-11-27 23:24:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048717650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:18,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:24:18,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-11-27 23:24:18,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399987271] [2024-11-27 23:24:18,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:18,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 23:24:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:18,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 23:24:18,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:24:19,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-27 23:24:19,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 221 flow. Second operand has 27 states, 27 states have (on average 13.37037037037037) internal successors, (361), 27 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:19,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:24:19,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-27 23:24:19,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:24:37,907 WARN L286 SmtUtils]: Spent 16.47s on a formula simplification. DAG size of input: 139 DAG size of output: 128 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:25:12,060 WARN L286 SmtUtils]: Spent 30.69s on a formula simplification. DAG size of input: 136 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:25:30,071 WARN L286 SmtUtils]: Spent 16.13s on a formula simplification. DAG size of input: 131 DAG size of output: 121 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:26:06,374 WARN L286 SmtUtils]: Spent 14.32s on a formula simplification. DAG size of input: 136 DAG size of output: 127 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:26:30,654 WARN L286 SmtUtils]: Spent 23.49s on a formula simplification. DAG size of input: 141 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:27:05,908 WARN L286 SmtUtils]: Spent 20.32s on a formula simplification. DAG size of input: 140 DAG size of output: 129 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:27:16,591 WARN L286 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 140 DAG size of output: 110 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:27:18,593 INFO L124 PetriNetUnfolderBase]: 1267/2633 cut-off events. [2024-11-27 23:27:18,593 INFO L125 PetriNetUnfolderBase]: For 1590/1590 co-relation queries the response was YES. [2024-11-27 23:27:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6691 conditions, 2633 events. 1267/2633 cut-off events. For 1590/1590 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14509 event pairs, 31 based on Foata normal form. 30/2651 useless extension candidates. Maximal degree in co-relation 6670. Up to 420 conditions per place. [2024-11-27 23:27:18,612 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 219 selfloop transitions, 88 changer transitions 52/367 dead transitions. [2024-11-27 23:27:18,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 367 transitions, 2092 flow [2024-11-27 23:27:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-27 23:27:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-27 23:27:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 850 transitions. [2024-11-27 23:27:18,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4106280193236715 [2024-11-27 23:27:18,621 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 221 flow. Second operand 45 states and 850 transitions. [2024-11-27 23:27:18,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 367 transitions, 2092 flow [2024-11-27 23:27:18,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 367 transitions, 2046 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 23:27:18,633 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 947 flow [2024-11-27 23:27:18,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=947, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-27 23:27:18,634 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-11-27 23:27:18,634 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 947 flow [2024-11-27 23:27:18,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.37037037037037) internal successors, (361), 27 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:27:18,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:27:18,635 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:18,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:27:18,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:18,836 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:27:18,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 179608547, now seen corresponding path program 2 times [2024-11-27 23:27:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810384502] [2024-11-27 23:27:18,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:18,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:18,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:27:18,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929884637] [2024-11-27 23:27:18,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:18,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:18,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:18,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:18,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:27:19,378 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:19,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:19,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-27 23:27:19,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:20,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-11-27 23:27:20,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 69 [2024-11-27 23:27:20,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2024-11-27 23:27:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:20,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:33,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 478 [2024-11-27 23:27:33,327 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-27 23:27:33,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 532 treesize of output 463 [2024-11-27 23:27:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810384502] [2024-11-27 23:27:48,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:27:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929884637] [2024-11-27 23:27:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929884637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:48,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:27:48,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2024-11-27 23:27:48,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627030143] [2024-11-27 23:27:48,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:48,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 23:27:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:48,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 23:27:48,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:27:49,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-27 23:27:49,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 947 flow. Second operand has 29 states, 29 states have (on average 12.344827586206897) internal successors, (358), 29 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:27:49,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:27:49,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-27 23:27:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:28:31,621 INFO L124 PetriNetUnfolderBase]: 2248/4752 cut-off events. [2024-11-27 23:28:31,621 INFO L125 PetriNetUnfolderBase]: For 11104/11104 co-relation queries the response was YES. [2024-11-27 23:28:31,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14500 conditions, 4752 events. 2248/4752 cut-off events. For 11104/11104 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 29794 event pairs, 257 based on Foata normal form. 68/4814 useless extension candidates. Maximal degree in co-relation 14464. Up to 1262 conditions per place. [2024-11-27 23:28:31,643 INFO L140 encePairwiseOnDemand]: 31/46 looper letters, 295 selfloop transitions, 129 changer transitions 53/486 dead transitions. [2024-11-27 23:28:31,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 486 transitions, 3672 flow [2024-11-27 23:28:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-27 23:28:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-11-27 23:28:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 908 transitions. [2024-11-27 23:28:31,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35889328063241105 [2024-11-27 23:28:31,649 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 947 flow. Second operand 55 states and 908 transitions. [2024-11-27 23:28:31,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 486 transitions, 3672 flow [2024-11-27 23:28:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 486 transitions, 3223 flow, removed 199 selfloop flow, removed 10 redundant places. [2024-11-27 23:28:31,708 INFO L231 Difference]: Finished difference. Result has 184 places, 218 transitions, 1779 flow [2024-11-27 23:28:31,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1779, PETRI_PLACES=184, PETRI_TRANSITIONS=218} [2024-11-27 23:28:31,709 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-11-27 23:28:31,709 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 218 transitions, 1779 flow [2024-11-27 23:28:31,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.344827586206897) internal successors, (358), 29 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:31,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:28:31,710 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:31,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:28:31,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:31,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:28:31,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:31,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1359770443, now seen corresponding path program 3 times [2024-11-27 23:28:31,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621151775] [2024-11-27 23:28:31,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:28:31,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:32,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:28:32,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:28:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350015800] [2024-11-27 23:28:32,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:28:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:32,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:32,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:28:32,433 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:28:32,433 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:32,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 23:28:32,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:32,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2024-11-27 23:28:32,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 61 [2024-11-27 23:28:33,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2024-11-27 23:28:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:33,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:43,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 478 [2024-11-27 23:28:44,054 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-27 23:28:44,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 532 treesize of output 463 [2024-11-27 23:28:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621151775] [2024-11-27 23:28:56,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:28:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350015800] [2024-11-27 23:28:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350015800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:56,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:56,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2024-11-27 23:28:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719195688] [2024-11-27 23:28:56,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:56,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:28:56,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:56,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:28:56,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:28:58,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-27 23:28:58,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 218 transitions, 1779 flow. Second operand has 28 states, 28 states have (on average 13.285714285714286) internal successors, (372), 28 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:58,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:28:58,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-27 23:28:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:29:17,558 WARN L286 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 182 DAG size of output: 78 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:29:47,721 WARN L286 SmtUtils]: Spent 25.22s on a formula simplification. DAG size of input: 178 DAG size of output: 74 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:30:05,288 WARN L286 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 134 DAG size of output: 67 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:30:13,997 WARN L286 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 196 DAG size of output: 105 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:30:24,858 WARN L286 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 97 DAG size of output: 49 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:30:36,924 WARN L286 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 152 DAG size of output: 98 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:31:12,023 WARN L286 SmtUtils]: Spent 32.80s on a formula simplification. DAG size of input: 115 DAG size of output: 80 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:31:18,145 INFO L124 PetriNetUnfolderBase]: 2914/6207 cut-off events. [2024-11-27 23:31:18,145 INFO L125 PetriNetUnfolderBase]: For 36380/36380 co-relation queries the response was YES. [2024-11-27 23:31:18,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23006 conditions, 6207 events. 2914/6207 cut-off events. For 36380/36380 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 40140 event pairs, 290 based on Foata normal form. 59/6258 useless extension candidates. Maximal degree in co-relation 22952. Up to 1531 conditions per place. [2024-11-27 23:31:18,204 INFO L140 encePairwiseOnDemand]: 31/46 looper letters, 293 selfloop transitions, 198 changer transitions 35/536 dead transitions. [2024-11-27 23:31:18,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 536 transitions, 4782 flow [2024-11-27 23:31:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-27 23:31:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-27 23:31:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 881 transitions. [2024-11-27 23:31:18,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3755328218243819 [2024-11-27 23:31:18,209 INFO L175 Difference]: Start difference. First operand has 184 places, 218 transitions, 1779 flow. Second operand 51 states and 881 transitions. [2024-11-27 23:31:18,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 536 transitions, 4782 flow [2024-11-27 23:31:18,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 536 transitions, 4679 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-11-27 23:31:18,460 INFO L231 Difference]: Finished difference. Result has 250 places, 300 transitions, 3165 flow [2024-11-27 23:31:18,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3165, PETRI_PLACES=250, PETRI_TRANSITIONS=300} [2024-11-27 23:31:18,462 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-11-27 23:31:18,462 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 300 transitions, 3165 flow [2024-11-27 23:31:18,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.285714285714286) internal successors, (372), 28 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:31:18,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:31:18,463 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:18,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:31:18,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:31:18,664 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:31:18,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash -47269355, now seen corresponding path program 1 times [2024-11-27 23:31:18,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:18,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988364675] [2024-11-27 23:31:18,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:31:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:31:18,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840592401] [2024-11-27 23:31:18,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:31:18,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:18,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:31:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:31:19,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-27 23:31:19,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:19,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:31:20,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:31:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:31:20,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:32,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 478 [2024-11-27 23:31:32,068 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-27 23:31:32,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 532 treesize of output 463 [2024-11-27 23:31:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:31:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988364675] [2024-11-27 23:31:53,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:31:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840592401] [2024-11-27 23:31:53,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840592401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:53,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:31:53,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2024-11-27 23:31:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629577819] [2024-11-27 23:31:53,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:53,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 23:31:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:53,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 23:31:53,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:31:55,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-11-27 23:31:55,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 300 transitions, 3165 flow. Second operand has 29 states, 29 states have (on average 14.620689655172415) internal successors, (424), 29 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:31:55,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:31:55,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-11-27 23:31:55,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:32:03,866 WARN L286 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 182 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:32:17,267 WARN L286 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 179 DAG size of output: 57 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:32:23,806 WARN L286 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 139 DAG size of output: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:32:36,373 WARN L286 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 184 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:32:42,453 WARN L286 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 144 DAG size of output: 58 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:32:44,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-27 23:32:45,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-27 23:32:49,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-27 23:33:20,448 WARN L286 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 183 DAG size of output: 62 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:33:26,622 WARN L286 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 141 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:33:39,263 WARN L286 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 144 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:33:46,843 WARN L286 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 137 DAG size of output: 99 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:34:21,787 INFO L124 PetriNetUnfolderBase]: 4494/9716 cut-off events. [2024-11-27 23:34:21,787 INFO L125 PetriNetUnfolderBase]: For 114944/115028 co-relation queries the response was YES. [2024-11-27 23:34:21,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42129 conditions, 9716 events. 4494/9716 cut-off events. For 114944/115028 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 70326 event pairs, 428 based on Foata normal form. 154/9840 useless extension candidates. Maximal degree in co-relation 42048. Up to 2619 conditions per place. [2024-11-27 23:34:21,921 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 485 selfloop transitions, 253 changer transitions 26/786 dead transitions. [2024-11-27 23:34:21,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 786 transitions, 8464 flow [2024-11-27 23:34:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-27 23:34:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-27 23:34:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1209 transitions. [2024-11-27 23:34:21,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41718426501035194 [2024-11-27 23:34:21,927 INFO L175 Difference]: Start difference. First operand has 250 places, 300 transitions, 3165 flow. Second operand 63 states and 1209 transitions. [2024-11-27 23:34:21,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 786 transitions, 8464 flow [2024-11-27 23:34:22,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 786 transitions, 8199 flow, removed 117 selfloop flow, removed 13 redundant places. [2024-11-27 23:34:22,831 INFO L231 Difference]: Finished difference. Result has 326 places, 454 transitions, 5758 flow [2024-11-27 23:34:22,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=5758, PETRI_PLACES=326, PETRI_TRANSITIONS=454} [2024-11-27 23:34:22,832 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-11-27 23:34:22,832 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 454 transitions, 5758 flow [2024-11-27 23:34:22,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 14.620689655172415) internal successors, (424), 29 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:34:22,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:34:22,833 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:22,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:34:23,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:34:23,034 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:34:23,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash 905542183, now seen corresponding path program 2 times [2024-11-27 23:34:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255659685] [2024-11-27 23:34:23,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:34:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:23,108 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:34:23,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:34:23,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249050226] [2024-11-27 23:34:23,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:34:23,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:23,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:23,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:23,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:34:23,705 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:34:23,705 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:23,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 23:34:23,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:23,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:34:24,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:34:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:34:25,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:36,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 466 treesize of output 446 [2024-11-27 23:34:36,286 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-11-27 23:34:36,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 496 treesize of output 427 [2024-11-27 23:35:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:35:01,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:35:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255659685] [2024-11-27 23:35:01,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:35:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249050226] [2024-11-27 23:35:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249050226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:35:01,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:35:01,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2024-11-27 23:35:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665885274] [2024-11-27 23:35:01,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:01,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:35:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:35:01,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:35:01,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-11-27 23:35:02,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-11-27 23:35:02,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 454 transitions, 5758 flow. Second operand has 31 states, 31 states have (on average 14.64516129032258) internal successors, (454), 31 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:35:02,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:35:02,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-11-27 23:35:02,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:35:09,317 WARN L286 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 130 DAG size of output: 100 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:35:26,625 WARN L286 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 132 DAG size of output: 101 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:35:52,897 WARN L286 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 131 DAG size of output: 102 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 23:36:11,420 INFO L124 PetriNetUnfolderBase]: 7545/16161 cut-off events. [2024-11-27 23:36:11,420 INFO L125 PetriNetUnfolderBase]: For 292572/292817 co-relation queries the response was YES. [2024-11-27 23:36:11,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78234 conditions, 16161 events. 7545/16161 cut-off events. For 292572/292817 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 126583 event pairs, 932 based on Foata normal form. 312/16402 useless extension candidates. Maximal degree in co-relation 78127. Up to 5272 conditions per place. [2024-11-27 23:36:11,725 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 588 selfloop transitions, 343 changer transitions 23/976 dead transitions. [2024-11-27 23:36:11,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 976 transitions, 12793 flow [2024-11-27 23:36:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-27 23:36:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-27 23:36:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 955 transitions. [2024-11-27 23:36:11,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4417206290471785 [2024-11-27 23:36:11,728 INFO L175 Difference]: Start difference. First operand has 326 places, 454 transitions, 5758 flow. Second operand 47 states and 955 transitions. [2024-11-27 23:36:11,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 976 transitions, 12793 flow [2024-11-27 23:36:14,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 976 transitions, 12218 flow, removed 270 selfloop flow, removed 12 redundant places. [2024-11-27 23:36:14,999 INFO L231 Difference]: Finished difference. Result has 372 places, 684 transitions, 9682 flow [2024-11-27 23:36:15,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=9682, PETRI_PLACES=372, PETRI_TRANSITIONS=684} [2024-11-27 23:36:15,000 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-11-27 23:36:15,000 INFO L471 AbstractCegarLoop]: Abstraction has has 372 places, 684 transitions, 9682 flow [2024-11-27 23:36:15,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 14.64516129032258) internal successors, (454), 31 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:36:15,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:36:15,001 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:15,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:36:15,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:36:15,201 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-27 23:36:15,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1860971959, now seen corresponding path program 4 times [2024-11-27 23:36:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484359692] [2024-11-27 23:36:15,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:36:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:15,439 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:36:15,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:36:15,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011742611] [2024-11-27 23:36:15,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:36:15,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:15,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:15,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f532ab-054d-4e5e-80b6-349d1f725d30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:36:17,116 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:36:17,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:17,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-27 23:36:17,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:17,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:36:17,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-27 23:36:18,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 51 [2024-11-27 23:36:18,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 77 [2024-11-27 23:36:18,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-11-27 23:36:20,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:36:20,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-27 23:36:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:36:20,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:50,435 WARN L286 SmtUtils]: Spent 33.84s on a formula simplification. DAG size of input: 267 DAG size of output: 267 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)