./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/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 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:35:41,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:35:41,409 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:35:41,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:35:41,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:35:41,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:35:41,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:35:41,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:35:41,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:35:41,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:35:41,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:35:41,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:35:41,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:35:41,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:35:41,456 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:35:41,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:35:41,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:35:41,456 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:35:41,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:35:41,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:35:41,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:35:41,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:35:41,458 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:35:41,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:35:41,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:35:41,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:35:41,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:35:41,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:35:41,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:35:41,460 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:35:41,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:35:41,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:35:41,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:35:41,462 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:35:41,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:35:41,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:35:41,462 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:35:41,462 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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/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 -> 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 [2024-11-28 02:35:41,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:35:41,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:35:41,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:35:41,780 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:35:41,780 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:35:41,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-11-28 02:35:44,898 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/data/de7eac972/bc8c264531d046d98df0782623f64872/FLAG9e0f312c9 [2024-11-28 02:35:45,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:35:45,190 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-11-28 02:35:45,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/data/de7eac972/bc8c264531d046d98df0782623f64872/FLAG9e0f312c9 [2024-11-28 02:35:45,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/data/de7eac972/bc8c264531d046d98df0782623f64872 [2024-11-28 02:35:45,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:35:45,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:35:45,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:35:45,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:35:45,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:35:45,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e8f2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45, skipping insertion in model container [2024-11-28 02:35:45,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,239 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:35:45,430 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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2024-11-28 02:35:45,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:35:45,457 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:35:45,480 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_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2024-11-28 02:35:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:35:45,499 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:35:45,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45 WrapperNode [2024-11-28 02:35:45,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:35:45,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:35:45,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:35:45,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:35:45,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,536 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2024-11-28 02:35:45,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:35:45,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:35:45,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:35:45,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:35:45,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,564 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 02:35:45,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:35:45,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:35:45,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:35:45,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:35:45,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (1/1) ... [2024-11-28 02:35:45,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:35:45,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:35:45,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:35:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:35:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:35:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:35:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:35:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:35:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:35:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:35:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:35:45,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:35:45,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:35:45,649 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:35:45,775 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:35:45,777 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:35:46,196 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:35:46,197 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:35:46,504 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:35:46,504 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 02:35:46,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:35:46 BoogieIcfgContainer [2024-11-28 02:35:46,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:35:46,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:35:46,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:35:46,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:35:46,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:35:45" (1/3) ... [2024-11-28 02:35:46,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe71846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:35:46, skipping insertion in model container [2024-11-28 02:35:46,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:35:45" (2/3) ... [2024-11-28 02:35:46,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe71846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:35:46, skipping insertion in model container [2024-11-28 02:35:46,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:35:46" (3/3) ... [2024-11-28 02:35:46,517 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2024-11-28 02:35:46,540 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:35:46,541 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-max-array.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 02:35:46,541 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:35:46,648 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:35:46,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-11-28 02:35:46,746 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-11-28 02:35:46,752 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:35:46,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-28 02:35:46,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-11-28 02:35:46,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-11-28 02:35:46,778 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:35:46,797 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;@3421c67f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:35:46,800 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 02:35:46,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:35:46,823 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-28 02:35:46,823 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:35:46,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:46,824 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:35:46,824 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:46,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2007485954, now seen corresponding path program 1 times [2024-11-28 02:35:46,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:46,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83068439] [2024-11-28 02:35:46,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:35:47,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83068439] [2024-11-28 02:35:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83068439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:35:47,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:35:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:35:47,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542785279] [2024-11-28 02:35:47,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:35:47,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:35:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:35:47,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:35:47,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:35:47,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-28 02:35:47,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:47,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:35:47,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-28 02:35:47,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:35:47,756 INFO L124 PetriNetUnfolderBase]: 617/953 cut-off events. [2024-11-28 02:35:47,758 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-28 02:35:47,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 953 events. 617/953 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3830 event pairs, 126 based on Foata normal form. 1/949 useless extension candidates. Maximal degree in co-relation 1714. Up to 677 conditions per place. [2024-11-28 02:35:47,775 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-11-28 02:35:47,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-11-28 02:35:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:35:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:35:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-28 02:35:47,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-28 02:35:47,801 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-11-28 02:35:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-11-28 02:35:47,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:35:47,819 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-11-28 02:35:47,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-28 02:35:47,826 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-28 02:35:47,826 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-11-28 02:35:47,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:47,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:47,826 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] [2024-11-28 02:35:47,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:35:47,827 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:47,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -123763169, now seen corresponding path program 1 times [2024-11-28 02:35:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442043211] [2024-11-28 02:35:47,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:48,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442043211] [2024-11-28 02:35:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442043211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:35:48,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:35:48,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:35:48,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016685887] [2024-11-28 02:35:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:35:48,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:35:48,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:35:48,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:35:48,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:35:48,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-28 02:35:48,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:48,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:35:48,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-28 02:35:48,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:35:48,451 INFO L124 PetriNetUnfolderBase]: 617/959 cut-off events. [2024-11-28 02:35:48,451 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2024-11-28 02:35:48,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2164 conditions, 959 events. 617/959 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3998 event pairs, 407 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 811. Up to 895 conditions per place. [2024-11-28 02:35:48,460 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-28 02:35:48,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2024-11-28 02:35:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:35:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:35:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-28 02:35:48,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-28 02:35:48,462 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2024-11-28 02:35:48,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2024-11-28 02:35:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:35:48,464 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2024-11-28 02:35:48,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-28 02:35:48,465 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-11-28 02:35:48,465 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2024-11-28 02:35:48,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:48,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:48,466 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] [2024-11-28 02:35:48,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:35:48,466 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:48,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1798765659, now seen corresponding path program 1 times [2024-11-28 02:35:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822217860] [2024-11-28 02:35:48,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:48,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822217860] [2024-11-28 02:35:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822217860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:35:48,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:35:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:35:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006153491] [2024-11-28 02:35:48,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:35:48,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:35:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:35:48,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:35:48,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:35:48,704 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:35:48,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:48,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:35:48,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:35:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:35:48,984 INFO L124 PetriNetUnfolderBase]: 790/1155 cut-off events. [2024-11-28 02:35:48,984 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-11-28 02:35:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1155 events. 790/1155 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4489 event pairs, 246 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 2556. Up to 576 conditions per place. [2024-11-28 02:35:48,998 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-28 02:35:48,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2024-11-28 02:35:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:35:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:35:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-28 02:35:49,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-28 02:35:49,003 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2024-11-28 02:35:49,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2024-11-28 02:35:49,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 02:35:49,007 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2024-11-28 02:35:49,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-28 02:35:49,008 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-28 02:35:49,008 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2024-11-28 02:35:49,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:49,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:49,009 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] [2024-11-28 02:35:49,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:35:49,009 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:49,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:49,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1453837311, now seen corresponding path program 1 times [2024-11-28 02:35:49,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:49,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122922666] [2024-11-28 02:35:49,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:49,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:49,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122922666] [2024-11-28 02:35:49,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122922666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:35:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905938984] [2024-11-28 02:35:49,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:35:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:35:49,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:35:49,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:35:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:49,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:35:49,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:35:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:49,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:35:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905938984] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:35:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:35:49,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-28 02:35:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914849815] [2024-11-28 02:35:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:35:49,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:35:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:35:49,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:35:49,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:35:49,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:35:49,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-11-28 02:35:49,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:35:49,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:35:49,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:35:49,810 INFO L124 PetriNetUnfolderBase]: 850/1293 cut-off events. [2024-11-28 02:35:49,812 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2024-11-28 02:35:49,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 1293 events. 850/1293 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5487 event pairs, 256 based on Foata normal form. 0/1239 useless extension candidates. Maximal degree in co-relation 3205. Up to 670 conditions per place. [2024-11-28 02:35:49,824 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-11-28 02:35:49,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2024-11-28 02:35:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:35:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:35:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-28 02:35:49,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-28 02:35:49,829 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2024-11-28 02:35:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2024-11-28 02:35:49,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:35:49,834 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2024-11-28 02:35:49,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-11-28 02:35:49,836 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-28 02:35:49,837 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2024-11-28 02:35:49,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-11-28 02:35:49,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:49,838 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:35:49,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:35:50,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:35:50,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:50,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1520605430, now seen corresponding path program 1 times [2024-11-28 02:35:50,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:50,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694444947] [2024-11-28 02:35:50,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:35:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694444947] [2024-11-28 02:35:51,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694444947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:35:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466120372] [2024-11-28 02:35:51,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:35:51,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:35:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:35:51,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:35:51,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:35:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:35:51,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:35:51,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:35:51,292 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 15 treesize of output 1 [2024-11-28 02:35:51,680 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 55 treesize of output 31 [2024-11-28 02:35:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:35:51,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:35:53,587 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 117 treesize of output 105 [2024-11-28 02:35:53,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:35:53,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-28 02:35:54,843 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 93 treesize of output 85 [2024-11-28 02:35:54,884 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:35:54,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 103 [2024-11-28 02:35:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:35:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466120372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:35:55,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:35:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-28 02:35:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542062501] [2024-11-28 02:35:55,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:35:55,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:35:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:35:55,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:35:55,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:35:55,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:35:55,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 24 states, 24 states have (on average 8.708333333333334) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:35:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:35:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:35:58,274 INFO L124 PetriNetUnfolderBase]: 1841/2761 cut-off events. [2024-11-28 02:35:58,274 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-11-28 02:35:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 2761 events. 1841/2761 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12611 event pairs, 106 based on Foata normal form. 1/2760 useless extension candidates. Maximal degree in co-relation 5614. Up to 1375 conditions per place. [2024-11-28 02:35:58,294 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2024-11-28 02:35:58,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2024-11-28 02:35:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:35:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 02:35:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2024-11-28 02:35:58,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-11-28 02:35:58,297 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2024-11-28 02:35:58,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2024-11-28 02:35:58,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:35:58,310 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2024-11-28 02:35:58,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2024-11-28 02:35:58,312 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2024-11-28 02:35:58,314 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2024-11-28 02:35:58,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.708333333333334) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:35:58,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:35:58,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:35:58,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:35:58,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:35:58,515 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:35:58,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:35:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1166693480, now seen corresponding path program 2 times [2024-11-28 02:35:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:35:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139998476] [2024-11-28 02:35:58,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:35:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:35:58,567 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:35:58,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:35:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:35:59,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:35:59,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139998476] [2024-11-28 02:35:59,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139998476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:35:59,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84577229] [2024-11-28 02:35:59,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:35:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:35:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:35:59,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:35:59,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:35:59,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:35:59,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:35:59,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:35:59,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:35:59,443 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 15 treesize of output 1 [2024-11-28 02:35:59,810 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 54 treesize of output 30 [2024-11-28 02:35:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:35:59,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:01,095 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 117 treesize of output 105 [2024-11-28 02:36:01,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:36:01,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-28 02:36:02,130 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 93 treesize of output 85 [2024-11-28 02:36:02,195 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 02:36:02,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 103 [2024-11-28 02:36:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:02,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84577229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:02,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-28 02:36:02,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239075378] [2024-11-28 02:36:02,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:02,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:36:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:02,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:36:02,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:36:02,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-28 02:36:02,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:02,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:02,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-28 02:36:02,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:05,278 INFO L124 PetriNetUnfolderBase]: 2050/3325 cut-off events. [2024-11-28 02:36:05,278 INFO L125 PetriNetUnfolderBase]: For 4824/4824 co-relation queries the response was YES. [2024-11-28 02:36:05,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10778 conditions, 3325 events. 2050/3325 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18014 event pairs, 118 based on Foata normal form. 3/3328 useless extension candidates. Maximal degree in co-relation 10228. Up to 1815 conditions per place. [2024-11-28 02:36:05,309 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 193 selfloop transitions, 121 changer transitions 2/322 dead transitions. [2024-11-28 02:36:05,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 322 transitions, 2167 flow [2024-11-28 02:36:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 02:36:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 02:36:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 474 transitions. [2024-11-28 02:36:05,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633431085043988 [2024-11-28 02:36:05,316 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 31 states and 474 transitions. [2024-11-28 02:36:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 322 transitions, 2167 flow [2024-11-28 02:36:05,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 322 transitions, 1959 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-11-28 02:36:05,348 INFO L231 Difference]: Finished difference. Result has 105 places, 182 transitions, 1307 flow [2024-11-28 02:36:05,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1307, PETRI_PLACES=105, PETRI_TRANSITIONS=182} [2024-11-28 02:36:05,350 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-11-28 02:36:05,351 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 182 transitions, 1307 flow [2024-11-28 02:36:05,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:05,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:05,352 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:05,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:36:05,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:05,557 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:05,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1312961448, now seen corresponding path program 3 times [2024-11-28 02:36:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346452840] [2024-11-28 02:36:05,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:36:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:05,593 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:36:05,594 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346452840] [2024-11-28 02:36:06,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346452840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:06,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170595415] [2024-11-28 02:36:06,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:36:06,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:06,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:06,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:36:06,330 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:36:06,330 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:06,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:36:06,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:06,389 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 15 treesize of output 1 [2024-11-28 02:36:06,681 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 55 treesize of output 31 [2024-11-28 02:36:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:06,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:07,913 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 53 treesize of output 47 [2024-11-28 02:36:07,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:36:07,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-28 02:36:07,998 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 66 treesize of output 58 [2024-11-28 02:36:08,009 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:36:08,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 1 [2024-11-28 02:36:08,016 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 69 treesize of output 61 [2024-11-28 02:36:08,031 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:36:08,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2024-11-28 02:36:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170595415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:08,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-11-28 02:36:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416459156] [2024-11-28 02:36:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:08,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:36:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:08,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:36:08,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:36:08,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-28 02:36:08,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 182 transitions, 1307 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:08,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:08,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-28 02:36:08,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:11,827 INFO L124 PetriNetUnfolderBase]: 3977/6435 cut-off events. [2024-11-28 02:36:11,827 INFO L125 PetriNetUnfolderBase]: For 17242/17284 co-relation queries the response was YES. [2024-11-28 02:36:11,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24733 conditions, 6435 events. 3977/6435 cut-off events. For 17242/17284 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39321 event pairs, 261 based on Foata normal form. 33/6468 useless extension candidates. Maximal degree in co-relation 23595. Up to 2818 conditions per place. [2024-11-28 02:36:11,895 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 242 selfloop transitions, 255 changer transitions 2/505 dead transitions. [2024-11-28 02:36:11,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 505 transitions, 4211 flow [2024-11-28 02:36:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 02:36:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 02:36:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 542 transitions. [2024-11-28 02:36:11,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4692640692640693 [2024-11-28 02:36:11,899 INFO L175 Difference]: Start difference. First operand has 105 places, 182 transitions, 1307 flow. Second operand 35 states and 542 transitions. [2024-11-28 02:36:11,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 505 transitions, 4211 flow [2024-11-28 02:36:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 505 transitions, 4018 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-11-28 02:36:11,953 INFO L231 Difference]: Finished difference. Result has 149 places, 342 transitions, 3150 flow [2024-11-28 02:36:11,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3150, PETRI_PLACES=149, PETRI_TRANSITIONS=342} [2024-11-28 02:36:11,954 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 114 predicate places. [2024-11-28 02:36:11,954 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 342 transitions, 3150 flow [2024-11-28 02:36:11,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:11,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:11,955 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:11,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:36:12,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 02:36:12,159 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:12,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1638273708, now seen corresponding path program 4 times [2024-11-28 02:36:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104221922] [2024-11-28 02:36:12,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:36:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:12,192 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:36:12,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:12,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104221922] [2024-11-28 02:36:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104221922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363161037] [2024-11-28 02:36:12,809 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:36:12,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:12,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:12,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:12,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:36:12,890 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:36:12,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:12,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:36:12,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:13,151 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 55 treesize of output 31 [2024-11-28 02:36:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:13,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:13,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:36:13,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2024-11-28 02:36:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363161037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:13,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:13,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-11-28 02:36:13,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937011542] [2024-11-28 02:36:13,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:13,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:36:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:13,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:36:13,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:36:13,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:36:13,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 342 transitions, 3150 flow. Second operand has 25 states, 25 states have (on average 8.52) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:13,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:13,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:36:13,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:15,300 INFO L124 PetriNetUnfolderBase]: 6313/9853 cut-off events. [2024-11-28 02:36:15,300 INFO L125 PetriNetUnfolderBase]: For 36867/36891 co-relation queries the response was YES. [2024-11-28 02:36:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42979 conditions, 9853 events. 6313/9853 cut-off events. For 36867/36891 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 62213 event pairs, 1027 based on Foata normal form. 14/9866 useless extension candidates. Maximal degree in co-relation 41557. Up to 7448 conditions per place. [2024-11-28 02:36:15,409 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 388 selfloop transitions, 258 changer transitions 1/652 dead transitions. [2024-11-28 02:36:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 652 transitions, 7159 flow [2024-11-28 02:36:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:36:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 02:36:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 192 transitions. [2024-11-28 02:36:15,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-11-28 02:36:15,411 INFO L175 Difference]: Start difference. First operand has 149 places, 342 transitions, 3150 flow. Second operand 15 states and 192 transitions. [2024-11-28 02:36:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 652 transitions, 7159 flow [2024-11-28 02:36:15,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 652 transitions, 6825 flow, removed 109 selfloop flow, removed 12 redundant places. [2024-11-28 02:36:15,604 INFO L231 Difference]: Finished difference. Result has 160 places, 546 transitions, 5929 flow [2024-11-28 02:36:15,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5929, PETRI_PLACES=160, PETRI_TRANSITIONS=546} [2024-11-28 02:36:15,605 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 125 predicate places. [2024-11-28 02:36:15,607 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 546 transitions, 5929 flow [2024-11-28 02:36:15,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.52) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:15,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:15,608 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:15,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:36:15,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:15,808 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:15,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 270889708, now seen corresponding path program 5 times [2024-11-28 02:36:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702665573] [2024-11-28 02:36:15,809 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:36:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:15,833 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:36:15,833 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702665573] [2024-11-28 02:36:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702665573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786342925] [2024-11-28 02:36:16,776 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:36:16,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:16,778 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:16,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:36:16,878 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:36:16,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:16,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:36:16,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:16,927 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 15 treesize of output 1 [2024-11-28 02:36:17,156 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 55 treesize of output 31 [2024-11-28 02:36:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:17,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:18,044 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 66 treesize of output 58 [2024-11-28 02:36:18,057 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 02:36:18,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-11-28 02:36:18,133 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 69 treesize of output 61 [2024-11-28 02:36:18,147 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:36:18,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2024-11-28 02:36:18,312 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 53 treesize of output 47 [2024-11-28 02:36:18,326 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:36:18,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 1 [2024-11-28 02:36:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:18,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786342925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:18,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:18,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2024-11-28 02:36:18,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060601606] [2024-11-28 02:36:18,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:18,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:36:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:18,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:36:18,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:36:18,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:36:18,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 546 transitions, 5929 flow. Second operand has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:18,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:36:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:22,514 INFO L124 PetriNetUnfolderBase]: 6996/11124 cut-off events. [2024-11-28 02:36:22,514 INFO L125 PetriNetUnfolderBase]: For 51535/51539 co-relation queries the response was YES. [2024-11-28 02:36:22,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52636 conditions, 11124 events. 6996/11124 cut-off events. For 51535/51539 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 73007 event pairs, 1175 based on Foata normal form. 8/11132 useless extension candidates. Maximal degree in co-relation 51975. Up to 6842 conditions per place. [2024-11-28 02:36:22,655 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 452 selfloop transitions, 369 changer transitions 1/827 dead transitions. [2024-11-28 02:36:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 827 transitions, 9735 flow [2024-11-28 02:36:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 02:36:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 02:36:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 490 transitions. [2024-11-28 02:36:22,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-28 02:36:22,659 INFO L175 Difference]: Start difference. First operand has 160 places, 546 transitions, 5929 flow. Second operand 35 states and 490 transitions. [2024-11-28 02:36:22,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 827 transitions, 9735 flow [2024-11-28 02:36:22,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 827 transitions, 9568 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-11-28 02:36:22,983 INFO L231 Difference]: Finished difference. Result has 207 places, 682 transitions, 8377 flow [2024-11-28 02:36:22,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8377, PETRI_PLACES=207, PETRI_TRANSITIONS=682} [2024-11-28 02:36:22,985 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 172 predicate places. [2024-11-28 02:36:22,986 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 682 transitions, 8377 flow [2024-11-28 02:36:22,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:22,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:22,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:23,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:36:23,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:23,188 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:23,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash 391234260, now seen corresponding path program 6 times [2024-11-28 02:36:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294281839] [2024-11-28 02:36:23,189 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:36:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:23,210 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:36:23,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:23,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294281839] [2024-11-28 02:36:23,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294281839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:23,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702598649] [2024-11-28 02:36:23,370 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:36:23,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:23,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:36:23,479 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:36:23,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:23,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:36:23,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:23,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:23,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702598649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:23,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:23,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 02:36:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677845662] [2024-11-28 02:36:23,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:23,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:36:23,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:23,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:36:23,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:36:23,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:36:23,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 682 transitions, 8377 flow. Second operand has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:23,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:23,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:36:23,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:27,698 INFO L124 PetriNetUnfolderBase]: 11864/17651 cut-off events. [2024-11-28 02:36:27,698 INFO L125 PetriNetUnfolderBase]: For 114117/114117 co-relation queries the response was YES. [2024-11-28 02:36:27,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90171 conditions, 17651 events. 11864/17651 cut-off events. For 114117/114117 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 112128 event pairs, 2888 based on Foata normal form. 54/17701 useless extension candidates. Maximal degree in co-relation 89386. Up to 6348 conditions per place. [2024-11-28 02:36:27,878 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 1066 selfloop transitions, 88 changer transitions 0/1157 dead transitions. [2024-11-28 02:36:27,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1157 transitions, 16187 flow [2024-11-28 02:36:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:36:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 02:36:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 219 transitions. [2024-11-28 02:36:27,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-11-28 02:36:27,879 INFO L175 Difference]: Start difference. First operand has 207 places, 682 transitions, 8377 flow. Second operand 14 states and 219 transitions. [2024-11-28 02:36:27,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1157 transitions, 16187 flow [2024-11-28 02:36:28,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1157 transitions, 15498 flow, removed 295 selfloop flow, removed 9 redundant places. [2024-11-28 02:36:28,561 INFO L231 Difference]: Finished difference. Result has 217 places, 716 transitions, 8600 flow [2024-11-28 02:36:28,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8600, PETRI_PLACES=217, PETRI_TRANSITIONS=716} [2024-11-28 02:36:28,563 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 182 predicate places. [2024-11-28 02:36:28,563 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 716 transitions, 8600 flow [2024-11-28 02:36:28,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:28,563 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:28,563 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:28,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:36:28,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:36:28,764 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:28,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1446587506, now seen corresponding path program 7 times [2024-11-28 02:36:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973351077] [2024-11-28 02:36:28,764 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:36:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:36:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973351077] [2024-11-28 02:36:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973351077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226397492] [2024-11-28 02:36:28,884 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:36:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:28,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:28,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:36:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:36:28,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:36:28,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:29,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226397492] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:29,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:36:29,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-28 02:36:29,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764060784] [2024-11-28 02:36:29,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:36:29,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:36:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:29,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:36:29,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:36:29,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:36:29,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 716 transitions, 8600 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:29,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:29,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:36:29,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:32,965 INFO L124 PetriNetUnfolderBase]: 11006/16424 cut-off events. [2024-11-28 02:36:32,965 INFO L125 PetriNetUnfolderBase]: For 118484/119446 co-relation queries the response was YES. [2024-11-28 02:36:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 16424 events. 11006/16424 cut-off events. For 118484/119446 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 104318 event pairs, 2248 based on Foata normal form. 903/17295 useless extension candidates. Maximal degree in co-relation 91649. Up to 5249 conditions per place. [2024-11-28 02:36:33,120 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 930 selfloop transitions, 76 changer transitions 0/1019 dead transitions. [2024-11-28 02:36:33,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1019 transitions, 14158 flow [2024-11-28 02:36:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:36:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:36:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-11-28 02:36:33,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-28 02:36:33,121 INFO L175 Difference]: Start difference. First operand has 217 places, 716 transitions, 8600 flow. Second operand 8 states and 144 transitions. [2024-11-28 02:36:33,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1019 transitions, 14158 flow [2024-11-28 02:36:33,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1019 transitions, 14069 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-11-28 02:36:33,630 INFO L231 Difference]: Finished difference. Result has 224 places, 727 transitions, 8932 flow [2024-11-28 02:36:33,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8559, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8932, PETRI_PLACES=224, PETRI_TRANSITIONS=727} [2024-11-28 02:36:33,631 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 189 predicate places. [2024-11-28 02:36:33,632 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 727 transitions, 8932 flow [2024-11-28 02:36:33,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:33,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:33,632 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:36:33,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:36:33,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:33,832 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:33,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash -163154713, now seen corresponding path program 8 times [2024-11-28 02:36:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557341143] [2024-11-28 02:36:33,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:36:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:33,849 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:36:33,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557341143] [2024-11-28 02:36:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557341143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81698052] [2024-11-28 02:36:33,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:36:33,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:33,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:33,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:36:34,043 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:36:34,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:34,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:36:34,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:34,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81698052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:34,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:34,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-28 02:36:34,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481310719] [2024-11-28 02:36:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:34,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:36:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:34,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:36:34,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:36:34,296 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 02:36:34,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 727 transitions, 8932 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:34,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:34,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 02:36:34,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:40,598 INFO L124 PetriNetUnfolderBase]: 18578/26865 cut-off events. [2024-11-28 02:36:40,598 INFO L125 PetriNetUnfolderBase]: For 202845/202845 co-relation queries the response was YES. [2024-11-28 02:36:40,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150672 conditions, 26865 events. 18578/26865 cut-off events. For 202845/202845 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 167776 event pairs, 3061 based on Foata normal form. 12/26877 useless extension candidates. Maximal degree in co-relation 149671. Up to 7186 conditions per place. [2024-11-28 02:36:40,997 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 1490 selfloop transitions, 320 changer transitions 0/1811 dead transitions. [2024-11-28 02:36:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1811 transitions, 25975 flow [2024-11-28 02:36:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:36:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:36:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 261 transitions. [2024-11-28 02:36:40,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41626794258373206 [2024-11-28 02:36:40,999 INFO L175 Difference]: Start difference. First operand has 224 places, 727 transitions, 8932 flow. Second operand 19 states and 261 transitions. [2024-11-28 02:36:40,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1811 transitions, 25975 flow [2024-11-28 02:36:43,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1811 transitions, 25834 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-11-28 02:36:43,034 INFO L231 Difference]: Finished difference. Result has 254 places, 947 transitions, 13260 flow [2024-11-28 02:36:43,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8913, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13260, PETRI_PLACES=254, PETRI_TRANSITIONS=947} [2024-11-28 02:36:43,036 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 219 predicate places. [2024-11-28 02:36:43,036 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 947 transitions, 13260 flow [2024-11-28 02:36:43,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:43,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:43,036 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:36:43,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:36:43,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:36:43,237 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:43,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 879388125, now seen corresponding path program 9 times [2024-11-28 02:36:43,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:43,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345575570] [2024-11-28 02:36:43,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:36:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:43,255 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:36:43,255 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:43,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:43,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345575570] [2024-11-28 02:36:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345575570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722421566] [2024-11-28 02:36:43,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:36:43,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:43,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:43,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:36:43,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:36:43,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:43,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:36:43,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:43,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722421566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:43,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 02:36:43,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853441165] [2024-11-28 02:36:43,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:43,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:36:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:43,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:36:43,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:36:43,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:36:43,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 947 transitions, 13260 flow. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:43,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:43,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:36:43,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:48,344 INFO L124 PetriNetUnfolderBase]: 11088/17228 cut-off events. [2024-11-28 02:36:48,344 INFO L125 PetriNetUnfolderBase]: For 204358/205328 co-relation queries the response was YES. [2024-11-28 02:36:48,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115125 conditions, 17228 events. 11088/17228 cut-off events. For 204358/205328 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 117740 event pairs, 3296 based on Foata normal form. 1349/18529 useless extension candidates. Maximal degree in co-relation 114283. Up to 6066 conditions per place. [2024-11-28 02:36:48,596 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 928 selfloop transitions, 92 changer transitions 0/1061 dead transitions. [2024-11-28 02:36:48,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1061 transitions, 16630 flow [2024-11-28 02:36:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:36:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:36:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-11-28 02:36:48,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-28 02:36:48,598 INFO L175 Difference]: Start difference. First operand has 254 places, 947 transitions, 13260 flow. Second operand 7 states and 121 transitions. [2024-11-28 02:36:48,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1061 transitions, 16630 flow [2024-11-28 02:36:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1061 transitions, 16529 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-11-28 02:36:50,408 INFO L231 Difference]: Finished difference. Result has 260 places, 863 transitions, 12339 flow [2024-11-28 02:36:50,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=12066, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12339, PETRI_PLACES=260, PETRI_TRANSITIONS=863} [2024-11-28 02:36:50,409 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 225 predicate places. [2024-11-28 02:36:50,409 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 863 transitions, 12339 flow [2024-11-28 02:36:50,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:50,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:50,410 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:36:50,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:36:50,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:36:50,614 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:50,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:50,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1588238774, now seen corresponding path program 1 times [2024-11-28 02:36:50,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:50,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221861590] [2024-11-28 02:36:50,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:36:50,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:36:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:50,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221861590] [2024-11-28 02:36:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221861590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142051381] [2024-11-28 02:36:50,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:36:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:50,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:50,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:36:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:36:50,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:36:50,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:50,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:36:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142051381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:36:50,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:36:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 02:36:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805901939] [2024-11-28 02:36:50,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:36:50,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:36:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:50,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:36:50,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:36:50,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:36:50,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 863 transitions, 12339 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:50,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:36:50,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:53,610 INFO L124 PetriNetUnfolderBase]: 5704/9195 cut-off events. [2024-11-28 02:36:53,610 INFO L125 PetriNetUnfolderBase]: For 123734/124048 co-relation queries the response was YES. [2024-11-28 02:36:53,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63000 conditions, 9195 events. 5704/9195 cut-off events. For 123734/124048 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 60320 event pairs, 2462 based on Foata normal form. 386/9558 useless extension candidates. Maximal degree in co-relation 62871. Up to 5224 conditions per place. [2024-11-28 02:36:53,744 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 566 selfloop transitions, 28 changer transitions 0/639 dead transitions. [2024-11-28 02:36:53,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 639 transitions, 10796 flow [2024-11-28 02:36:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:36:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:36:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-28 02:36:53,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-11-28 02:36:53,745 INFO L175 Difference]: Start difference. First operand has 260 places, 863 transitions, 12339 flow. Second operand 6 states and 98 transitions. [2024-11-28 02:36:53,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 639 transitions, 10796 flow [2024-11-28 02:36:54,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 639 transitions, 10354 flow, removed 106 selfloop flow, removed 13 redundant places. [2024-11-28 02:36:54,674 INFO L231 Difference]: Finished difference. Result has 239 places, 566 transitions, 8367 flow [2024-11-28 02:36:54,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8283, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8367, PETRI_PLACES=239, PETRI_TRANSITIONS=566} [2024-11-28 02:36:54,675 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 204 predicate places. [2024-11-28 02:36:54,675 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 566 transitions, 8367 flow [2024-11-28 02:36:54,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:54,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:54,675 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:36:54,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:36:54,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:36:54,876 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:54,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1477015189, now seen corresponding path program 10 times [2024-11-28 02:36:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708464399] [2024-11-28 02:36:54,877 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:36:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:54,885 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:36:54,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:36:54,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708464399] [2024-11-28 02:36:54,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708464399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:36:54,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:36:54,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:36:54,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225441363] [2024-11-28 02:36:54,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:36:54,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:36:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:36:54,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:36:54,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:36:55,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:36:55,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 566 transitions, 8367 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:55,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:36:55,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:36:55,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:36:57,944 INFO L124 PetriNetUnfolderBase]: 8641/13114 cut-off events. [2024-11-28 02:36:57,944 INFO L125 PetriNetUnfolderBase]: For 141403/141768 co-relation queries the response was YES. [2024-11-28 02:36:58,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84931 conditions, 13114 events. 8641/13114 cut-off events. For 141403/141768 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 80804 event pairs, 1646 based on Foata normal form. 196/13293 useless extension candidates. Maximal degree in co-relation 84228. Up to 4235 conditions per place. [2024-11-28 02:36:58,124 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 591 selfloop transitions, 128 changer transitions 25/747 dead transitions. [2024-11-28 02:36:58,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 747 transitions, 12108 flow [2024-11-28 02:36:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:36:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:36:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-11-28 02:36:58,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-11-28 02:36:58,126 INFO L175 Difference]: Start difference. First operand has 239 places, 566 transitions, 8367 flow. Second operand 8 states and 133 transitions. [2024-11-28 02:36:58,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 747 transitions, 12108 flow [2024-11-28 02:36:59,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 747 transitions, 11910 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-11-28 02:36:59,518 INFO L231 Difference]: Finished difference. Result has 243 places, 567 transitions, 8673 flow [2024-11-28 02:36:59,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8293, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8673, PETRI_PLACES=243, PETRI_TRANSITIONS=567} [2024-11-28 02:36:59,519 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 208 predicate places. [2024-11-28 02:36:59,519 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 567 transitions, 8673 flow [2024-11-28 02:36:59,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:36:59,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:36:59,520 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:36:59,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:36:59,520 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:36:59,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:36:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1900266949, now seen corresponding path program 11 times [2024-11-28 02:36:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:36:59,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259400825] [2024-11-28 02:36:59,521 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:36:59,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:36:59,536 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 02:36:59,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:59,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:36:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259400825] [2024-11-28 02:36:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259400825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:36:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394339326] [2024-11-28 02:36:59,664 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:36:59,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:36:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:36:59,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:36:59,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:36:59,775 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 02:36:59,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:36:59,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:36:59,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:36:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:36:59,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:00,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394339326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:00,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 02:37:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240383595] [2024-11-28 02:37:00,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:00,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:37:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:00,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:37:00,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:37:00,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 02:37:00,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 567 transitions, 8673 flow. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:00,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:00,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 02:37:00,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:02,434 INFO L124 PetriNetUnfolderBase]: 5641/8985 cut-off events. [2024-11-28 02:37:02,434 INFO L125 PetriNetUnfolderBase]: For 113389/113577 co-relation queries the response was YES. [2024-11-28 02:37:02,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60214 conditions, 8985 events. 5641/8985 cut-off events. For 113389/113577 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57636 event pairs, 2507 based on Foata normal form. 368/9301 useless extension candidates. Maximal degree in co-relation 59573. Up to 6208 conditions per place. [2024-11-28 02:37:02,538 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 330 selfloop transitions, 3 changer transitions 226/567 dead transitions. [2024-11-28 02:37:02,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 567 transitions, 9702 flow [2024-11-28 02:37:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:37:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:37:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-11-28 02:37:02,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-28 02:37:02,539 INFO L175 Difference]: Start difference. First operand has 243 places, 567 transitions, 8673 flow. Second operand 7 states and 110 transitions. [2024-11-28 02:37:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 567 transitions, 9702 flow [2024-11-28 02:37:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 567 transitions, 9504 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-11-28 02:37:03,481 INFO L231 Difference]: Finished difference. Result has 243 places, 341 transitions, 4660 flow [2024-11-28 02:37:03,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4660, PETRI_PLACES=243, PETRI_TRANSITIONS=341} [2024-11-28 02:37:03,482 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 208 predicate places. [2024-11-28 02:37:03,482 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 341 transitions, 4660 flow [2024-11-28 02:37:03,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:03,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:03,483 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:37:03,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:03,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:37:03,683 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:37:03,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:03,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1463506721, now seen corresponding path program 12 times [2024-11-28 02:37:03,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:03,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124997701] [2024-11-28 02:37:03,684 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:37:03,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:03,697 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:37:03,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:37:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:03,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124997701] [2024-11-28 02:37:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124997701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:03,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867062639] [2024-11-28 02:37:03,821 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:37:03,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:03,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:03,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:37:03,913 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:37:03,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:03,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:37:03,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:04,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:04,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867062639] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:04,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:37:04,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2024-11-28 02:37:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856643296] [2024-11-28 02:37:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:04,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:37:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:04,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:37:04,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:37:04,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:37:04,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 341 transitions, 4660 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:04,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:04,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:37:04,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:06,211 INFO L124 PetriNetUnfolderBase]: 8393/12475 cut-off events. [2024-11-28 02:37:06,211 INFO L125 PetriNetUnfolderBase]: For 137432/137484 co-relation queries the response was YES. [2024-11-28 02:37:06,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82335 conditions, 12475 events. 8393/12475 cut-off events. For 137432/137484 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 73463 event pairs, 866 based on Foata normal form. 54/12525 useless extension candidates. Maximal degree in co-relation 82255. Up to 5045 conditions per place. [2024-11-28 02:37:06,676 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 494 selfloop transitions, 145 changer transitions 0/645 dead transitions. [2024-11-28 02:37:06,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 645 transitions, 9616 flow [2024-11-28 02:37:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:37:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 02:37:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-11-28 02:37:06,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-11-28 02:37:06,678 INFO L175 Difference]: Start difference. First operand has 243 places, 341 transitions, 4660 flow. Second operand 12 states and 185 transitions. [2024-11-28 02:37:06,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 645 transitions, 9616 flow [2024-11-28 02:37:07,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 645 transitions, 8879 flow, removed 267 selfloop flow, removed 28 redundant places. [2024-11-28 02:37:07,217 INFO L231 Difference]: Finished difference. Result has 199 places, 394 transitions, 5317 flow [2024-11-28 02:37:07,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5317, PETRI_PLACES=199, PETRI_TRANSITIONS=394} [2024-11-28 02:37:07,218 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-11-28 02:37:07,218 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 394 transitions, 5317 flow [2024-11-28 02:37:07,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:07,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:07,219 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:37:07,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:07,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:37:07,419 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:37:07,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 833862157, now seen corresponding path program 13 times [2024-11-28 02:37:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616421828] [2024-11-28 02:37:07,420 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:37:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:07,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616421828] [2024-11-28 02:37:07,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616421828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394504542] [2024-11-28 02:37:07,563 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:37:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:07,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:07,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:37:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:07,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:37:07,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:07,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:07,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394504542] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:07,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:37:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 18 [2024-11-28 02:37:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330986753] [2024-11-28 02:37:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:07,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:37:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:07,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:37:07,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:37:07,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:37:07,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 394 transitions, 5317 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:07,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:07,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:37:07,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:10,806 INFO L124 PetriNetUnfolderBase]: 9260/13744 cut-off events. [2024-11-28 02:37:10,806 INFO L125 PetriNetUnfolderBase]: For 156023/156051 co-relation queries the response was YES. [2024-11-28 02:37:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94780 conditions, 13744 events. 9260/13744 cut-off events. For 156023/156051 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 82228 event pairs, 1359 based on Foata normal form. 42/13777 useless extension candidates. Maximal degree in co-relation 94713. Up to 5543 conditions per place. [2024-11-28 02:37:10,959 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 514 selfloop transitions, 179 changer transitions 0/699 dead transitions. [2024-11-28 02:37:10,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 699 transitions, 10382 flow [2024-11-28 02:37:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:37:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 02:37:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 195 transitions. [2024-11-28 02:37:10,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-28 02:37:10,960 INFO L175 Difference]: Start difference. First operand has 199 places, 394 transitions, 5317 flow. Second operand 13 states and 195 transitions. [2024-11-28 02:37:10,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 699 transitions, 10382 flow [2024-11-28 02:37:11,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 699 transitions, 10303 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-11-28 02:37:11,708 INFO L231 Difference]: Finished difference. Result has 213 places, 431 transitions, 6506 flow [2024-11-28 02:37:11,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6506, PETRI_PLACES=213, PETRI_TRANSITIONS=431} [2024-11-28 02:37:11,709 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-11-28 02:37:11,709 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 431 transitions, 6506 flow [2024-11-28 02:37:11,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:11,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:11,709 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:37:11,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:37:11,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:37:11,910 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:37:11,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1719677885, now seen corresponding path program 14 times [2024-11-28 02:37:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589845311] [2024-11-28 02:37:11,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:37:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:11,924 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:37:11,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:12,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589845311] [2024-11-28 02:37:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589845311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863993797] [2024-11-28 02:37:12,045 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:37:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:12,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:12,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:37:12,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:37:12,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:12,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:37:12,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:12,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863993797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:12,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:12,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-28 02:37:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701638995] [2024-11-28 02:37:12,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:12,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:37:12,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:12,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:37:12,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:37:12,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:37:12,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 431 transitions, 6506 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:12,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:12,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:37:12,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:16,720 INFO L124 PetriNetUnfolderBase]: 12418/18197 cut-off events. [2024-11-28 02:37:16,720 INFO L125 PetriNetUnfolderBase]: For 226819/226851 co-relation queries the response was YES. [2024-11-28 02:37:16,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133742 conditions, 18197 events. 12418/18197 cut-off events. For 226819/226851 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 111429 event pairs, 1277 based on Foata normal form. 42/18230 useless extension candidates. Maximal degree in co-relation 133670. Up to 7699 conditions per place. [2024-11-28 02:37:16,995 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 699 selfloop transitions, 241 changer transitions 0/946 dead transitions. [2024-11-28 02:37:16,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 946 transitions, 14865 flow [2024-11-28 02:37:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:37:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 02:37:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 406 transitions. [2024-11-28 02:37:16,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4556677890011223 [2024-11-28 02:37:16,997 INFO L175 Difference]: Start difference. First operand has 213 places, 431 transitions, 6506 flow. Second operand 27 states and 406 transitions. [2024-11-28 02:37:16,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 946 transitions, 14865 flow [2024-11-28 02:37:19,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 946 transitions, 14690 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-11-28 02:37:19,075 INFO L231 Difference]: Finished difference. Result has 241 places, 492 transitions, 8093 flow [2024-11-28 02:37:19,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6384, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8093, PETRI_PLACES=241, PETRI_TRANSITIONS=492} [2024-11-28 02:37:19,076 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 206 predicate places. [2024-11-28 02:37:19,076 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 492 transitions, 8093 flow [2024-11-28 02:37:19,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:19,076 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:19,076 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:37:19,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:19,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:19,277 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:37:19,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1462837025, now seen corresponding path program 15 times [2024-11-28 02:37:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196549628] [2024-11-28 02:37:19,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:37:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:19,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:37:19,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196549628] [2024-11-28 02:37:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196549628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492594375] [2024-11-28 02:37:19,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:37:19,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:19,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:37:19,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:37:19,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:19,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:37:19,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:19,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492594375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:19,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-28 02:37:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867414923] [2024-11-28 02:37:19,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:19,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:37:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:19,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:37:19,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:37:19,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-28 02:37:19,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 492 transitions, 8093 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:19,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:19,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-28 02:37:19,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:24,226 INFO L124 PetriNetUnfolderBase]: 13281/19446 cut-off events. [2024-11-28 02:37:24,226 INFO L125 PetriNetUnfolderBase]: For 280899/280931 co-relation queries the response was YES. [2024-11-28 02:37:24,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150683 conditions, 19446 events. 13281/19446 cut-off events. For 280899/280931 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 120484 event pairs, 1530 based on Foata normal form. 25/19463 useless extension candidates. Maximal degree in co-relation 150604. Up to 8325 conditions per place. [2024-11-28 02:37:24,844 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 600 selfloop transitions, 232 changer transitions 0/838 dead transitions. [2024-11-28 02:37:24,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 838 transitions, 14515 flow [2024-11-28 02:37:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:37:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:37:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 278 transitions. [2024-11-28 02:37:24,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4433811802232855 [2024-11-28 02:37:24,846 INFO L175 Difference]: Start difference. First operand has 241 places, 492 transitions, 8093 flow. Second operand 19 states and 278 transitions. [2024-11-28 02:37:24,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 838 transitions, 14515 flow [2024-11-28 02:37:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 838 transitions, 14314 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-11-28 02:37:27,246 INFO L231 Difference]: Finished difference. Result has 256 places, 537 transitions, 9809 flow [2024-11-28 02:37:27,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7895, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9809, PETRI_PLACES=256, PETRI_TRANSITIONS=537} [2024-11-28 02:37:27,247 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 221 predicate places. [2024-11-28 02:37:27,247 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 537 transitions, 9809 flow [2024-11-28 02:37:27,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:27,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:27,247 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 02:37:27,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:27,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:27,449 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 02:37:27,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash 865075115, now seen corresponding path program 16 times [2024-11-28 02:37:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:27,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681898321] [2024-11-28 02:37:27,450 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:37:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:27,459 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:37:27,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:37:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681898321] [2024-11-28 02:37:27,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681898321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:27,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928097132] [2024-11-28 02:37:27,525 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:37:27,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:27,527 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:27,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef23cd1-6a50-4e3c-ac5d-9c1e8d33e5c4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:37:27,601 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:37:27,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:27,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:37:27,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:37:27,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:37:27,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928097132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:27,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-28 02:37:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366189074] [2024-11-28 02:37:27,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:27,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:37:27,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:27,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:37:27,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:37:27,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 02:37:27,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 537 transitions, 9809 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:27,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:27,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 02:37:27,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand