./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:19:25,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:19:25,169 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:19:25,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:19:25,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:19:25,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:19:25,211 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:19:25,212 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:19:25,212 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:19:25,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:19:25,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:19:25,213 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:19:25,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:19:25,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:19:25,214 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:19:25,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:19:25,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:19:25,218 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:19:25,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:19:25,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:19:25,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:19:25,219 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:19:25,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:25,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:19:25,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:25,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:19:25,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:19:25,221 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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-11-28 03:19:25,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:19:25,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:19:25,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:19:25,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:19:25,643 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:19:25,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:19:28,985 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/data/59e492c42/3e4f9e5b69314bbb97453b206f8a1c71/FLAGcc6a55f3c [2024-11-28 03:19:29,277 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:19:29,279 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:19:29,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/data/59e492c42/3e4f9e5b69314bbb97453b206f8a1c71/FLAGcc6a55f3c [2024-11-28 03:19:29,323 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/data/59e492c42/3e4f9e5b69314bbb97453b206f8a1c71 [2024-11-28 03:19:29,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:19:29,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:19:29,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:29,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:19:29,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:19:29,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b18bb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29, skipping insertion in model container [2024-11-28 03:19:29,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,369 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:19:29,647 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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-11-28 03:19:29,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:29,679 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:19:29,722 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_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-11-28 03:19:29,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:29,753 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:19:29,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29 WrapperNode [2024-11-28 03:19:29,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:29,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:29,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:19:29,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:19:29,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,812 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2024-11-28 03:19:29,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:29,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:19:29,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:19:29,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:19:29,825 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,847 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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 03:19:29,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,847 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,856 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,866 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,872 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,873 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:19:29,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:19:29,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:19:29,879 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:19:29,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (1/1) ... [2024-11-28 03:19:29,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:29,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:29,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:19:29,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:19:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:19:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:19:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:19:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:19:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:19:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:19:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:19:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:19:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:19:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:19:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:19:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:19:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:19:29,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:19:29,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:19:29,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:19:29,973 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 03:19:30,115 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:19:30,117 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:19:30,481 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:19:30,481 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:19:30,751 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:19:30,751 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:19:30,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:30 BoogieIcfgContainer [2024-11-28 03:19:30,751 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:19:30,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:19:30,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:19:30,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:19:30,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:29" (1/3) ... [2024-11-28 03:19:30,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a720e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:30, skipping insertion in model container [2024-11-28 03:19:30,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:29" (2/3) ... [2024-11-28 03:19:30,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a720e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:30, skipping insertion in model container [2024-11-28 03:19:30,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:30" (3/3) ... [2024-11-28 03:19:30,766 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:19:30,782 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:19:30,784 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 25 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 03:19:30,784 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:19:30,835 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:19:30,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2024-11-28 03:19:30,907 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-28 03:19:30,909 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:19:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2024-11-28 03:19:30,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2024-11-28 03:19:30,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2024-11-28 03:19:30,924 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:19:30,937 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;@182dafaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:19:30,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 03:19:30,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:19:30,951 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-11-28 03:19:30,951 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:19:30,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:30,952 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:30,953 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:30,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1905084127, now seen corresponding path program 1 times [2024-11-28 03:19:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343958470] [2024-11-28 03:19:30,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:31,235 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 03:19:31,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343958470] [2024-11-28 03:19:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343958470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:31,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065780706] [2024-11-28 03:19:31,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:31,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:19:31,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:31,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:19:31,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:19:31,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-28 03:19:31,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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 03:19:31,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:31,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-28 03:19:31,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:31,459 INFO L124 PetriNetUnfolderBase]: 108/204 cut-off events. [2024-11-28 03:19:31,460 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-28 03:19:31,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 204 events. 108/204 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 640 event pairs, 83 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 362. Up to 178 conditions per place. [2024-11-28 03:19:31,467 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 20 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-11-28 03:19:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 100 flow [2024-11-28 03:19:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:19:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-28 03:19:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 34 transitions. [2024-11-28 03:19:31,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-11-28 03:19:31,489 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 34 transitions. [2024-11-28 03:19:31,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 100 flow [2024-11-28 03:19:31,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:19:31,500 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2024-11-28 03:19:31,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-11-28 03:19:31,509 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-28 03:19:31,509 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2024-11-28 03:19:31,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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 03:19:31,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:31,511 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 03:19:31,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:19:31,511 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:31,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1467600150, now seen corresponding path program 1 times [2024-11-28 03:19:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734936682] [2024-11-28 03:19:31,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:31,992 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 03:19:31,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734936682] [2024-11-28 03:19:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734936682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:31,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454854064] [2024-11-28 03:19:31,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:31,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:31,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:31,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:31,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-28 03:19:31,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 03:19:31,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:31,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-28 03:19:31,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:32,167 INFO L124 PetriNetUnfolderBase]: 121/239 cut-off events. [2024-11-28 03:19:32,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:19:32,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 239 events. 121/239 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 788 event pairs, 96 based on Foata normal form. 17/242 useless extension candidates. Maximal degree in co-relation 460. Up to 178 conditions per place. [2024-11-28 03:19:32,174 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 19 selfloop transitions, 2 changer transitions 8/33 dead transitions. [2024-11-28 03:19:32,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 130 flow [2024-11-28 03:19:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:19:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-28 03:19:32,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-11-28 03:19:32,178 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 4 states and 56 transitions. [2024-11-28 03:19:32,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 130 flow [2024-11-28 03:19:32,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:19:32,181 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 70 flow [2024-11-28 03:19:32,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-11-28 03:19:32,182 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2024-11-28 03:19:32,182 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 70 flow [2024-11-28 03:19:32,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 03:19:32,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:32,183 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] [2024-11-28 03:19:32,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:19:32,183 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:32,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash 412268035, now seen corresponding path program 1 times [2024-11-28 03:19:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369182876] [2024-11-28 03:19:32,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:33,243 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 03:19:33,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369182876] [2024-11-28 03:19:33,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369182876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:33,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:33,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:33,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417072248] [2024-11-28 03:19:33,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:33,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:33,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:33,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:33,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:33,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:33,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:33,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:33,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:33,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:33,713 INFO L124 PetriNetUnfolderBase]: 205/380 cut-off events. [2024-11-28 03:19:33,713 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 03:19:33,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 380 events. 205/380 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1469 event pairs, 5 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 824. Up to 227 conditions per place. [2024-11-28 03:19:33,721 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 44 selfloop transitions, 14 changer transitions 5/66 dead transitions. [2024-11-28 03:19:33,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 66 transitions, 303 flow [2024-11-28 03:19:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-11-28 03:19:33,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-11-28 03:19:33,727 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 70 flow. Second operand 10 states and 113 transitions. [2024-11-28 03:19:33,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 66 transitions, 303 flow [2024-11-28 03:19:33,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 66 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:19:33,731 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 151 flow [2024-11-28 03:19:33,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-28 03:19:33,732 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-11-28 03:19:33,732 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 151 flow [2024-11-28 03:19:33,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:33,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:33,733 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] [2024-11-28 03:19:33,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:19:33,733 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:33,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1033048073, now seen corresponding path program 2 times [2024-11-28 03:19:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910674272] [2024-11-28 03:19:33,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:33,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:33,753 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:19:33,754 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:33,806 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 03:19:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:33,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910674272] [2024-11-28 03:19:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910674272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056575793] [2024-11-28 03:19:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:33,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:33,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:33,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:33,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-28 03:19:33,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:19:33,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:33,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-28 03:19:33,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:33,908 INFO L124 PetriNetUnfolderBase]: 151/293 cut-off events. [2024-11-28 03:19:33,909 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-11-28 03:19:33,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 293 events. 151/293 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1043 event pairs, 33 based on Foata normal form. 8/300 useless extension candidates. Maximal degree in co-relation 812. Up to 224 conditions per place. [2024-11-28 03:19:33,912 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-28 03:19:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 242 flow [2024-11-28 03:19:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:19:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-11-28 03:19:33,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-28 03:19:33,914 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 151 flow. Second operand 3 states and 46 transitions. [2024-11-28 03:19:33,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 242 flow [2024-11-28 03:19:33,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 232 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 03:19:33,918 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 155 flow [2024-11-28 03:19:33,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-28 03:19:33,919 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-11-28 03:19:33,919 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 155 flow [2024-11-28 03:19:33,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 03:19:33,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:33,920 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] [2024-11-28 03:19:33,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:19:33,920 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:33,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1506534743, now seen corresponding path program 3 times [2024-11-28 03:19:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:33,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429817895] [2024-11-28 03:19:33,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:33,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:19:33,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:34,624 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 03:19:34,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:34,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429817895] [2024-11-28 03:19:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429817895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:34,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:34,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474313522] [2024-11-28 03:19:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:34,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:34,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:34,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:34,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:34,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 155 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:34,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:34,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:34,966 INFO L124 PetriNetUnfolderBase]: 193/372 cut-off events. [2024-11-28 03:19:34,966 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-11-28 03:19:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 372 events. 193/372 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1456 event pairs, 25 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 1123. Up to 226 conditions per place. [2024-11-28 03:19:34,971 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 44 selfloop transitions, 18 changer transitions 5/70 dead transitions. [2024-11-28 03:19:34,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 431 flow [2024-11-28 03:19:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-11-28 03:19:34,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-11-28 03:19:34,973 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 155 flow. Second operand 10 states and 112 transitions. [2024-11-28 03:19:34,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 431 flow [2024-11-28 03:19:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 400 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-28 03:19:34,980 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 237 flow [2024-11-28 03:19:34,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-28 03:19:34,981 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-11-28 03:19:34,981 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 237 flow [2024-11-28 03:19:34,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:34,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:34,981 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] [2024-11-28 03:19:34,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:19:34,982 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:34,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 581537557, now seen corresponding path program 4 times [2024-11-28 03:19:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:34,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982645331] [2024-11-28 03:19:34,985 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:35,025 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:35,028 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:35,705 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 03:19:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:35,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982645331] [2024-11-28 03:19:35,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982645331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:35,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:35,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:35,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028420768] [2024-11-28 03:19:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:35,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:35,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:35,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:35,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:35,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-28 03:19:35,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 237 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 03:19:35,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:35,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-28 03:19:35,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:36,127 INFO L124 PetriNetUnfolderBase]: 228/430 cut-off events. [2024-11-28 03:19:36,127 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-11-28 03:19:36,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 430 events. 228/430 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1708 event pairs, 34 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 1366. Up to 273 conditions per place. [2024-11-28 03:19:36,131 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 52 selfloop transitions, 22 changer transitions 5/81 dead transitions. [2024-11-28 03:19:36,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 550 flow [2024-11-28 03:19:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-11-28 03:19:36,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-11-28 03:19:36,133 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 237 flow. Second operand 10 states and 110 transitions. [2024-11-28 03:19:36,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 550 flow [2024-11-28 03:19:36,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 515 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-28 03:19:36,139 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 339 flow [2024-11-28 03:19:36,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-11-28 03:19:36,139 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-11-28 03:19:36,140 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 339 flow [2024-11-28 03:19:36,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 03:19:36,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:36,140 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] [2024-11-28 03:19:36,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:19:36,140 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:36,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1010820329, now seen corresponding path program 5 times [2024-11-28 03:19:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967617165] [2024-11-28 03:19:36,142 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:19:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:36,173 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:36,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:36,752 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 03:19:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967617165] [2024-11-28 03:19:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967617165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:36,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178258137] [2024-11-28 03:19:36,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:36,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:36,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:36,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:36,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:36,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:37,174 INFO L124 PetriNetUnfolderBase]: 206/417 cut-off events. [2024-11-28 03:19:37,174 INFO L125 PetriNetUnfolderBase]: For 816/816 co-relation queries the response was YES. [2024-11-28 03:19:37,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 417 events. 206/417 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1794 event pairs, 15 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1474. Up to 223 conditions per place. [2024-11-28 03:19:37,179 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 50 selfloop transitions, 27 changer transitions 5/85 dead transitions. [2024-11-28 03:19:37,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 644 flow [2024-11-28 03:19:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:19:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:19:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-11-28 03:19:37,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-11-28 03:19:37,182 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 339 flow. Second operand 11 states and 122 transitions. [2024-11-28 03:19:37,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 644 flow [2024-11-28 03:19:37,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 630 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-28 03:19:37,193 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 429 flow [2024-11-28 03:19:37,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=429, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2024-11-28 03:19:37,195 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-11-28 03:19:37,197 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 429 flow [2024-11-28 03:19:37,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:37,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:37,197 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] [2024-11-28 03:19:37,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:19:37,198 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:37,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:37,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1659323889, now seen corresponding path program 6 times [2024-11-28 03:19:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:37,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530658112] [2024-11-28 03:19:37,199 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:19:37,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:37,233 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 03:19:37,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:37,740 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 03:19:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530658112] [2024-11-28 03:19:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530658112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:37,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:37,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101129541] [2024-11-28 03:19:37,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:37,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:37,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:37,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:37,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:37,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:37,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:37,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:37,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:38,120 INFO L124 PetriNetUnfolderBase]: 218/449 cut-off events. [2024-11-28 03:19:38,120 INFO L125 PetriNetUnfolderBase]: For 1441/1441 co-relation queries the response was YES. [2024-11-28 03:19:38,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 449 events. 218/449 cut-off events. For 1441/1441 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2002 event pairs, 22 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 1726. Up to 287 conditions per place. [2024-11-28 03:19:38,125 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 55 selfloop transitions, 23 changer transitions 5/86 dead transitions. [2024-11-28 03:19:38,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 734 flow [2024-11-28 03:19:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-11-28 03:19:38,127 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2024-11-28 03:19:38,127 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 429 flow. Second operand 10 states and 114 transitions. [2024-11-28 03:19:38,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 734 flow [2024-11-28 03:19:38,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 656 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-11-28 03:19:38,136 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 452 flow [2024-11-28 03:19:38,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=452, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-28 03:19:38,137 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2024-11-28 03:19:38,137 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 452 flow [2024-11-28 03:19:38,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:38,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:38,138 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] [2024-11-28 03:19:38,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:19:38,141 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:38,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash -779960843, now seen corresponding path program 7 times [2024-11-28 03:19:38,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:38,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709335616] [2024-11-28 03:19:38,142 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:19:38,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:38,635 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 03:19:38,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709335616] [2024-11-28 03:19:38,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709335616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:38,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:38,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320617745] [2024-11-28 03:19:38,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:38,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:38,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:38,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:38,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:38,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:38,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:38,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:38,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:38,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:38,962 INFO L124 PetriNetUnfolderBase]: 214/436 cut-off events. [2024-11-28 03:19:38,962 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2024-11-28 03:19:38,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 436 events. 214/436 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1915 event pairs, 22 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 1732. Up to 291 conditions per place. [2024-11-28 03:19:38,967 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 8/82 dead transitions. [2024-11-28 03:19:38,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 713 flow [2024-11-28 03:19:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-28 03:19:38,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3758620689655172 [2024-11-28 03:19:38,968 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 452 flow. Second operand 10 states and 109 transitions. [2024-11-28 03:19:38,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 713 flow [2024-11-28 03:19:38,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 656 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-28 03:19:38,976 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 448 flow [2024-11-28 03:19:38,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2024-11-28 03:19:38,977 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-11-28 03:19:38,977 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 448 flow [2024-11-28 03:19:38,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:38,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:38,978 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] [2024-11-28 03:19:38,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:19:38,978 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:38,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1928370255, now seen corresponding path program 8 times [2024-11-28 03:19:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:38,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015393438] [2024-11-28 03:19:38,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:38,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:38,997 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:19:38,997 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:39,446 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 03:19:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015393438] [2024-11-28 03:19:39,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015393438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:39,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:39,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:39,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709177390] [2024-11-28 03:19:39,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:39,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:39,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:39,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:39,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:39,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 448 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:39,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:39,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:39,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:39,814 INFO L124 PetriNetUnfolderBase]: 223/461 cut-off events. [2024-11-28 03:19:39,814 INFO L125 PetriNetUnfolderBase]: For 1715/1715 co-relation queries the response was YES. [2024-11-28 03:19:39,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 461 events. 223/461 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2083 event pairs, 34 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 1827. Up to 297 conditions per place. [2024-11-28 03:19:39,818 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 58 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2024-11-28 03:19:39,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 89 transitions, 788 flow [2024-11-28 03:19:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-11-28 03:19:39,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 03:19:39,820 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 448 flow. Second operand 10 states and 116 transitions. [2024-11-28 03:19:39,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 89 transitions, 788 flow [2024-11-28 03:19:39,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 734 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-28 03:19:39,828 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 491 flow [2024-11-28 03:19:39,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=491, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-11-28 03:19:39,829 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-11-28 03:19:39,829 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 491 flow [2024-11-28 03:19:39,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:39,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:39,830 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] [2024-11-28 03:19:39,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:19:39,830 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:39,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -246071311, now seen corresponding path program 9 times [2024-11-28 03:19:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:39,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405818406] [2024-11-28 03:19:39,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:39,849 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:19:39,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:40,247 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 03:19:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405818406] [2024-11-28 03:19:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405818406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:40,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:40,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767620965] [2024-11-28 03:19:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:40,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:40,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:40,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:40,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:40,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 491 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:40,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:40,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:40,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:40,577 INFO L124 PetriNetUnfolderBase]: 219/448 cut-off events. [2024-11-28 03:19:40,577 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2024-11-28 03:19:40,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 448 events. 219/448 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2015 event pairs, 34 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1891. Up to 301 conditions per place. [2024-11-28 03:19:40,582 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 52 selfloop transitions, 22 changer transitions 8/85 dead transitions. [2024-11-28 03:19:40,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 793 flow [2024-11-28 03:19:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-11-28 03:19:40,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38275862068965516 [2024-11-28 03:19:40,584 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 491 flow. Second operand 10 states and 111 transitions. [2024-11-28 03:19:40,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 793 flow [2024-11-28 03:19:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 726 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-28 03:19:40,596 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 479 flow [2024-11-28 03:19:40,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=479, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2024-11-28 03:19:40,597 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-11-28 03:19:40,598 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 479 flow [2024-11-28 03:19:40,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:40,598 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:40,598 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] [2024-11-28 03:19:40,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:19:40,599 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:40,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1210151775, now seen corresponding path program 10 times [2024-11-28 03:19:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:40,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124581833] [2024-11-28 03:19:40,600 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:40,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:40,635 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:40,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:41,103 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 03:19:41,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:41,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124581833] [2024-11-28 03:19:41,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124581833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:41,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500187717] [2024-11-28 03:19:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:41,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:41,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:41,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:41,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:41,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-28 03:19:41,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 479 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 03:19:41,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:41,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-28 03:19:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:41,627 INFO L124 PetriNetUnfolderBase]: 260/516 cut-off events. [2024-11-28 03:19:41,628 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-11-28 03:19:41,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 516 events. 260/516 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2271 event pairs, 49 based on Foata normal form. 1/517 useless extension candidates. Maximal degree in co-relation 2159. Up to 339 conditions per place. [2024-11-28 03:19:41,635 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 67 selfloop transitions, 23 changer transitions 5/97 dead transitions. [2024-11-28 03:19:41,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 97 transitions, 877 flow [2024-11-28 03:19:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-11-28 03:19:41,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2024-11-28 03:19:41,638 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 479 flow. Second operand 10 states and 114 transitions. [2024-11-28 03:19:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 97 transitions, 877 flow [2024-11-28 03:19:41,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 97 transitions, 821 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-28 03:19:41,655 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 546 flow [2024-11-28 03:19:41,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2024-11-28 03:19:41,658 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-11-28 03:19:41,659 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 546 flow [2024-11-28 03:19:41,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 03:19:41,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:41,660 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] [2024-11-28 03:19:41,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:19:41,661 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:41,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1091495903, now seen corresponding path program 11 times [2024-11-28 03:19:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857036645] [2024-11-28 03:19:41,664 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:19:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:41,699 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:41,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:42,104 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 03:19:42,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:42,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857036645] [2024-11-28 03:19:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857036645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:42,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:19:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251165046] [2024-11-28 03:19:42,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:42,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:42,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:42,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:42,166 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-28 03:19:42,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 546 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:42,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:42,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-28 03:19:42,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:42,492 INFO L124 PetriNetUnfolderBase]: 229/465 cut-off events. [2024-11-28 03:19:42,492 INFO L125 PetriNetUnfolderBase]: For 3197/3197 co-relation queries the response was YES. [2024-11-28 03:19:42,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 465 events. 229/465 cut-off events. For 3197/3197 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2047 event pairs, 41 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 2086. Up to 316 conditions per place. [2024-11-28 03:19:42,498 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 56 selfloop transitions, 21 changer transitions 8/88 dead transitions. [2024-11-28 03:19:42,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 857 flow [2024-11-28 03:19:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:19:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-11-28 03:19:42,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-11-28 03:19:42,500 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 546 flow. Second operand 10 states and 112 transitions. [2024-11-28 03:19:42,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 857 flow [2024-11-28 03:19:42,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 780 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-11-28 03:19:42,513 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 524 flow [2024-11-28 03:19:42,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-11-28 03:19:42,514 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-11-28 03:19:42,514 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 524 flow [2024-11-28 03:19:42,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 03:19:42,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:42,514 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 03:19:42,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:19:42,515 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:42,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -529353039, now seen corresponding path program 1 times [2024-11-28 03:19:42,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:42,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344360630] [2024-11-28 03:19:42,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:42,670 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 03:19:42,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:42,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344360630] [2024-11-28 03:19:42,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344360630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:42,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492388421] [2024-11-28 03:19:42,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:42,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:19:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:42,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:19:42,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:42,954 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 03:19:42,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:43,106 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 03:19:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492388421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:43,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 03:19:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962499383] [2024-11-28 03:19:43,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:43,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:19:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:43,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:19:43,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:19:43,109 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-28 03:19:43,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 524 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 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 03:19:43,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:43,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-28 03:19:43,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:43,443 INFO L124 PetriNetUnfolderBase]: 367/799 cut-off events. [2024-11-28 03:19:43,444 INFO L125 PetriNetUnfolderBase]: For 5964/5964 co-relation queries the response was YES. [2024-11-28 03:19:43,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3680 conditions, 799 events. 367/799 cut-off events. For 5964/5964 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4373 event pairs, 172 based on Foata normal form. 24/821 useless extension candidates. Maximal degree in co-relation 3648. Up to 379 conditions per place. [2024-11-28 03:19:43,456 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 110 selfloop transitions, 5 changer transitions 10/129 dead transitions. [2024-11-28 03:19:43,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1278 flow [2024-11-28 03:19:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:19:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-11-28 03:19:43,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2024-11-28 03:19:43,459 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 524 flow. Second operand 6 states and 83 transitions. [2024-11-28 03:19:43,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1278 flow [2024-11-28 03:19:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 1168 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-28 03:19:43,482 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 516 flow [2024-11-28 03:19:43,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2024-11-28 03:19:43,484 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-11-28 03:19:43,485 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 516 flow [2024-11-28 03:19:43,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 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 03:19:43,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:43,485 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:43,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:19:43,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:19:43,690 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:43,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash 378674756, now seen corresponding path program 1 times [2024-11-28 03:19:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:43,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138902180] [2024-11-28 03:19:43,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:43,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138902180] [2024-11-28 03:19:43,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138902180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:43,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983835346] [2024-11-28 03:19:43,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:43,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:43,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:43,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:19:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:43,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:43,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:44,042 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 03:19:44,042 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:44,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983835346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:44,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:19:44,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-28 03:19:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567085785] [2024-11-28 03:19:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:44,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:44,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:44,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:19:44,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-28 03:19:44,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 516 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 03:19:44,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:44,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-28 03:19:44,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:44,299 INFO L124 PetriNetUnfolderBase]: 340/793 cut-off events. [2024-11-28 03:19:44,299 INFO L125 PetriNetUnfolderBase]: For 6710/6820 co-relation queries the response was YES. [2024-11-28 03:19:44,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 793 events. 340/793 cut-off events. For 6710/6820 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4475 event pairs, 98 based on Foata normal form. 65/857 useless extension candidates. Maximal degree in co-relation 3501. Up to 319 conditions per place. [2024-11-28 03:19:44,308 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 55 selfloop transitions, 7 changer transitions 26/92 dead transitions. [2024-11-28 03:19:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 845 flow [2024-11-28 03:19:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:19:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-28 03:19:44,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-28 03:19:44,311 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 516 flow. Second operand 4 states and 74 transitions. [2024-11-28 03:19:44,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 845 flow [2024-11-28 03:19:44,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 92 transitions, 806 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-28 03:19:44,325 INFO L231 Difference]: Finished difference. Result has 87 places, 40 transitions, 300 flow [2024-11-28 03:19:44,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=87, PETRI_TRANSITIONS=40} [2024-11-28 03:19:44,327 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-11-28 03:19:44,327 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 40 transitions, 300 flow [2024-11-28 03:19:44,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 03:19:44,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:44,328 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] [2024-11-28 03:19:44,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:44,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:19:44,532 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:44,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:44,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1696714742, now seen corresponding path program 2 times [2024-11-28 03:19:44,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:44,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085831849] [2024-11-28 03:19:44,534 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:44,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:44,562 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085831849] [2024-11-28 03:19:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085831849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563352109] [2024-11-28 03:19:45,011 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:45,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:45,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:45,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:45,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:19:45,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:45,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:45,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:19:45,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:45,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:45,574 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:19:45,575 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 25 treesize of output 12 [2024-11-28 03:19:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563352109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:45,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-28 03:19:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145008715] [2024-11-28 03:19:45,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:45,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:19:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:45,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:19:45,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:19:45,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-28 03:19:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 40 transitions, 300 flow. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 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 03:19:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:45,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-28 03:19:45,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:47,853 INFO L124 PetriNetUnfolderBase]: 1077/1949 cut-off events. [2024-11-28 03:19:47,853 INFO L125 PetriNetUnfolderBase]: For 21125/21125 co-relation queries the response was YES. [2024-11-28 03:19:47,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8996 conditions, 1949 events. 1077/1949 cut-off events. For 21125/21125 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10007 event pairs, 83 based on Foata normal form. 89/2037 useless extension candidates. Maximal degree in co-relation 8963. Up to 472 conditions per place. [2024-11-28 03:19:47,876 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 202 selfloop transitions, 51 changer transitions 0/255 dead transitions. [2024-11-28 03:19:47,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 255 transitions, 2317 flow [2024-11-28 03:19:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:19:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:19:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 342 transitions. [2024-11-28 03:19:47,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-11-28 03:19:47,879 INFO L175 Difference]: Start difference. First operand has 87 places, 40 transitions, 300 flow. Second operand 27 states and 342 transitions. [2024-11-28 03:19:47,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 255 transitions, 2317 flow [2024-11-28 03:19:47,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 255 transitions, 1736 flow, removed 276 selfloop flow, removed 19 redundant places. [2024-11-28 03:19:47,905 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 785 flow [2024-11-28 03:19:47,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=785, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-11-28 03:19:47,906 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-11-28 03:19:47,906 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 785 flow [2024-11-28 03:19:47,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 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 03:19:47,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:47,906 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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 03:19:47,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:19:48,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:19:48,111 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:48,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1486309937, now seen corresponding path program 3 times [2024-11-28 03:19:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:48,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741188899] [2024-11-28 03:19:48,112 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:48,152 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:19:48,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:19:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741188899] [2024-11-28 03:19:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741188899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289252913] [2024-11-28 03:19:48,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:48,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:48,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:48,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:48,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:19:48,380 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:19:48,381 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:48,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:19:48,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:19:48,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:48,487 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:19:48,488 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 25 treesize of output 12 [2024-11-28 03:19:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:19:48,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289252913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:48,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:48,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-28 03:19:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133399431] [2024-11-28 03:19:48,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:48,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:48,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:48,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:48,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:48,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-28 03:19:48,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 785 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:48,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-28 03:19:48,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:49,168 INFO L124 PetriNetUnfolderBase]: 1542/2746 cut-off events. [2024-11-28 03:19:49,169 INFO L125 PetriNetUnfolderBase]: For 17655/17655 co-relation queries the response was YES. [2024-11-28 03:19:49,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12187 conditions, 2746 events. 1542/2746 cut-off events. For 17655/17655 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14755 event pairs, 289 based on Foata normal form. 28/2772 useless extension candidates. Maximal degree in co-relation 12155. Up to 1125 conditions per place. [2024-11-28 03:19:49,210 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 115 selfloop transitions, 36 changer transitions 0/153 dead transitions. [2024-11-28 03:19:49,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1700 flow [2024-11-28 03:19:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:19:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-11-28 03:19:49,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2024-11-28 03:19:49,212 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 785 flow. Second operand 6 states and 77 transitions. [2024-11-28 03:19:49,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1700 flow [2024-11-28 03:19:49,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 1519 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-11-28 03:19:49,302 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 908 flow [2024-11-28 03:19:49,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-11-28 03:19:49,303 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-11-28 03:19:49,303 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 908 flow [2024-11-28 03:19:49,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:49,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:49,303 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] [2024-11-28 03:19:49,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:49,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:19:49,504 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:19:49,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash 890663619, now seen corresponding path program 1 times [2024-11-28 03:19:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332939848] [2024-11-28 03:19:49,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332939848] [2024-11-28 03:19:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332939848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132298453] [2024-11-28 03:19:51,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:51,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:51,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:19:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:51,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:19:51,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:52,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:53,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:19:53,826 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 42 treesize of output 34 [2024-11-28 03:19:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132298453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:54,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:54,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-28 03:19:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287497004] [2024-11-28 03:19:54,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:54,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:19:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:54,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:19:54,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:19:54,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:19:54,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 908 flow. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:19:54,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:54,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:19:54,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:07,522 INFO L124 PetriNetUnfolderBase]: 3128/5392 cut-off events. [2024-11-28 03:20:07,522 INFO L125 PetriNetUnfolderBase]: For 32984/32984 co-relation queries the response was YES. [2024-11-28 03:20:07,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 5392 events. 3128/5392 cut-off events. For 32984/32984 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 32291 event pairs, 359 based on Foata normal form. 3/5395 useless extension candidates. Maximal degree in co-relation 24505. Up to 3100 conditions per place. [2024-11-28 03:20:07,576 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 242 selfloop transitions, 274 changer transitions 10/527 dead transitions. [2024-11-28 03:20:07,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 527 transitions, 5156 flow [2024-11-28 03:20:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-28 03:20:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-11-28 03:20:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 514 transitions. [2024-11-28 03:20:07,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2606490872210953 [2024-11-28 03:20:07,581 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 908 flow. Second operand 68 states and 514 transitions. [2024-11-28 03:20:07,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 527 transitions, 5156 flow [2024-11-28 03:20:07,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 527 transitions, 5097 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-28 03:20:07,780 INFO L231 Difference]: Finished difference. Result has 172 places, 376 transitions, 4322 flow [2024-11-28 03:20:07,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4322, PETRI_PLACES=172, PETRI_TRANSITIONS=376} [2024-11-28 03:20:07,780 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 144 predicate places. [2024-11-28 03:20:07,781 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 376 transitions, 4322 flow [2024-11-28 03:20:07,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:20:07,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:07,781 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] [2024-11-28 03:20:07,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:07,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:20:07,982 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:20:07,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1668700237, now seen corresponding path program 2 times [2024-11-28 03:20:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411840107] [2024-11-28 03:20:07,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:08,032 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:08,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:09,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:09,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411840107] [2024-11-28 03:20:09,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411840107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:09,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824241066] [2024-11-28 03:20:09,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:09,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:09,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:20:09,560 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:09,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:09,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:20:09,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:10,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:11,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:11,568 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 40 treesize of output 32 [2024-11-28 03:20:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:12,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824241066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:12,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-28 03:20:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405349455] [2024-11-28 03:20:12,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:12,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:20:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:12,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:20:12,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2332, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:20:12,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:20:12,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 376 transitions, 4322 flow. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:20:12,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:12,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:20:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:26,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:31,921 INFO L124 PetriNetUnfolderBase]: 3508/6098 cut-off events. [2024-11-28 03:20:31,921 INFO L125 PetriNetUnfolderBase]: For 45172/45172 co-relation queries the response was YES. [2024-11-28 03:20:31,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33468 conditions, 6098 events. 3508/6098 cut-off events. For 45172/45172 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 37972 event pairs, 236 based on Foata normal form. 3/6101 useless extension candidates. Maximal degree in co-relation 33421. Up to 3182 conditions per place. [2024-11-28 03:20:32,002 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 339 selfloop transitions, 472 changer transitions 10/822 dead transitions. [2024-11-28 03:20:32,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 822 transitions, 9457 flow [2024-11-28 03:20:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 03:20:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-11-28 03:20:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 593 transitions. [2024-11-28 03:20:32,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27264367816091956 [2024-11-28 03:20:32,011 INFO L175 Difference]: Start difference. First operand has 172 places, 376 transitions, 4322 flow. Second operand 75 states and 593 transitions. [2024-11-28 03:20:32,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 822 transitions, 9457 flow [2024-11-28 03:20:32,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 822 transitions, 8824 flow, removed 311 selfloop flow, removed 6 redundant places. [2024-11-28 03:20:32,459 INFO L231 Difference]: Finished difference. Result has 258 places, 625 transitions, 7974 flow [2024-11-28 03:20:32,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=7974, PETRI_PLACES=258, PETRI_TRANSITIONS=625} [2024-11-28 03:20:32,460 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 230 predicate places. [2024-11-28 03:20:32,460 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 625 transitions, 7974 flow [2024-11-28 03:20:32,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:20:32,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:32,461 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] [2024-11-28 03:20:32,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:20:32,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:32,661 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:20:32,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 591588705, now seen corresponding path program 3 times [2024-11-28 03:20:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347361987] [2024-11-28 03:20:32,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:32,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:20:32,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:34,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:34,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347361987] [2024-11-28 03:20:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347361987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:34,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378551960] [2024-11-28 03:20:34,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:34,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:34,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:34,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:20:34,423 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:20:34,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:34,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:20:34,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:35,599 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:20:35,599 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 23 treesize of output 10 [2024-11-28 03:20:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:35,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:37,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:37,152 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 40 treesize of output 32 [2024-11-28 03:20:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378551960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:38,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:38,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-28 03:20:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64026391] [2024-11-28 03:20:38,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:38,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:20:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:38,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:20:38,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:20:38,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:20:38,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 625 transitions, 7974 flow. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:20:38,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:38,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:20:38,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:00,530 INFO L124 PetriNetUnfolderBase]: 4085/7126 cut-off events. [2024-11-28 03:21:00,531 INFO L125 PetriNetUnfolderBase]: For 64894/64894 co-relation queries the response was YES. [2024-11-28 03:21:00,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44728 conditions, 7126 events. 4085/7126 cut-off events. For 64894/64894 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 46223 event pairs, 269 based on Foata normal form. 3/7127 useless extension candidates. Maximal degree in co-relation 44663. Up to 3791 conditions per place. [2024-11-28 03:21:00,623 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 432 selfloop transitions, 668 changer transitions 10/1111 dead transitions. [2024-11-28 03:21:00,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1111 transitions, 14961 flow [2024-11-28 03:21:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 03:21:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-11-28 03:21:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 659 transitions. [2024-11-28 03:21:00,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27378479434981307 [2024-11-28 03:21:00,627 INFO L175 Difference]: Start difference. First operand has 258 places, 625 transitions, 7974 flow. Second operand 83 states and 659 transitions. [2024-11-28 03:21:00,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1111 transitions, 14961 flow [2024-11-28 03:21:01,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1111 transitions, 14052 flow, removed 438 selfloop flow, removed 7 redundant places. [2024-11-28 03:21:01,642 INFO L231 Difference]: Finished difference. Result has 359 places, 897 transitions, 13089 flow [2024-11-28 03:21:01,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=13089, PETRI_PLACES=359, PETRI_TRANSITIONS=897} [2024-11-28 03:21:01,643 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 331 predicate places. [2024-11-28 03:21:01,643 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 897 transitions, 13089 flow [2024-11-28 03:21:01,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:21:01,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:01,643 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] [2024-11-28 03:21:01,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:21:01,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:01,845 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:21:01,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash 174923707, now seen corresponding path program 4 times [2024-11-28 03:21:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:01,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054765669] [2024-11-28 03:21:01,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:21:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:01,880 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:21:01,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:03,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054765669] [2024-11-28 03:21:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054765669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:03,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379902522] [2024-11-28 03:21:03,873 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:21:03,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:03,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:03,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:21:03,978 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:21:03,978 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:03,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:21:03,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:05,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:06,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:06,457 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 40 treesize of output 32 [2024-11-28 03:21:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379902522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:07,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-28 03:21:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600753092] [2024-11-28 03:21:07,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:07,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 03:21:07,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:07,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 03:21:07,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:21:07,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:21:07,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 897 transitions, 13089 flow. Second operand has 52 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 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 03:21:07,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:07,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:21:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:20,709 INFO L124 PetriNetUnfolderBase]: 4267/7521 cut-off events. [2024-11-28 03:21:20,710 INFO L125 PetriNetUnfolderBase]: For 81375/81375 co-relation queries the response was YES. [2024-11-28 03:21:20,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52633 conditions, 7521 events. 4267/7521 cut-off events. For 81375/81375 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 50248 event pairs, 228 based on Foata normal form. 3/7524 useless extension candidates. Maximal degree in co-relation 52542. Up to 3886 conditions per place. [2024-11-28 03:21:20,820 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 445 selfloop transitions, 743 changer transitions 10/1199 dead transitions. [2024-11-28 03:21:20,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1199 transitions, 18216 flow [2024-11-28 03:21:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 03:21:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-28 03:21:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 560 transitions. [2024-11-28 03:21:20,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2798600699650175 [2024-11-28 03:21:20,824 INFO L175 Difference]: Start difference. First operand has 359 places, 897 transitions, 13089 flow. Second operand 69 states and 560 transitions. [2024-11-28 03:21:20,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1199 transitions, 18216 flow [2024-11-28 03:21:22,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1199 transitions, 17553 flow, removed 255 selfloop flow, removed 22 redundant places. [2024-11-28 03:21:22,335 INFO L231 Difference]: Finished difference. Result has 418 places, 1010 transitions, 16721 flow [2024-11-28 03:21:22,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=16721, PETRI_PLACES=418, PETRI_TRANSITIONS=1010} [2024-11-28 03:21:22,336 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 390 predicate places. [2024-11-28 03:21:22,336 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 1010 transitions, 16721 flow [2024-11-28 03:21:22,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.5) internal successors, (234), 52 states have internal predecessors, (234), 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 03:21:22,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:22,337 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] [2024-11-28 03:21:22,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:21:22,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:21:22,537 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:21:22,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 727776247, now seen corresponding path program 5 times [2024-11-28 03:21:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:22,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649571683] [2024-11-28 03:21:22,538 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:22,563 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:22,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649571683] [2024-11-28 03:21:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649571683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788368680] [2024-11-28 03:21:24,278 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:24,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:24,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:24,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:21:24,395 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:24,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:24,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:21:24,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:25,064 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 12 treesize of output 3 [2024-11-28 03:21:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:25,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:26,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:26,690 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 51 treesize of output 35 [2024-11-28 03:21:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788368680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:27,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:27,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2024-11-28 03:21:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903091758] [2024-11-28 03:21:27,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:27,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 03:21:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:27,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 03:21:27,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 03:21:27,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:21:27,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1010 transitions, 16721 flow. Second operand has 54 states, 54 states have (on average 4.444444444444445) internal successors, (240), 54 states have internal predecessors, (240), 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 03:21:27,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:27,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:21:27,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:48,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:21:53,648 INFO L124 PetriNetUnfolderBase]: 4882/8768 cut-off events. [2024-11-28 03:21:53,648 INFO L125 PetriNetUnfolderBase]: For 122385/122385 co-relation queries the response was YES. [2024-11-28 03:21:53,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67696 conditions, 8768 events. 4882/8768 cut-off events. For 122385/122385 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 62103 event pairs, 218 based on Foata normal form. 12/8780 useless extension candidates. Maximal degree in co-relation 67597. Up to 3624 conditions per place. [2024-11-28 03:21:53,784 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 554 selfloop transitions, 978 changer transitions 52/1585 dead transitions. [2024-11-28 03:21:53,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1585 transitions, 27034 flow [2024-11-28 03:21:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-28 03:21:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2024-11-28 03:21:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 815 transitions. [2024-11-28 03:21:53,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27284901238701037 [2024-11-28 03:21:53,788 INFO L175 Difference]: Start difference. First operand has 418 places, 1010 transitions, 16721 flow. Second operand 103 states and 815 transitions. [2024-11-28 03:21:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1585 transitions, 27034 flow [2024-11-28 03:21:56,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1585 transitions, 26584 flow, removed 125 selfloop flow, removed 26 redundant places. [2024-11-28 03:21:56,031 INFO L231 Difference]: Finished difference. Result has 521 places, 1276 transitions, 24722 flow [2024-11-28 03:21:56,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16297, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=24722, PETRI_PLACES=521, PETRI_TRANSITIONS=1276} [2024-11-28 03:21:56,033 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 493 predicate places. [2024-11-28 03:21:56,033 INFO L471 AbstractCegarLoop]: Abstraction has has 521 places, 1276 transitions, 24722 flow [2024-11-28 03:21:56,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.444444444444445) internal successors, (240), 54 states have internal predecessors, (240), 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 03:21:56,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:56,033 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] [2024-11-28 03:21:56,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:21:56,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:56,234 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:21:56,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash -837344103, now seen corresponding path program 6 times [2024-11-28 03:21:56,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:56,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376031604] [2024-11-28 03:21:56,235 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:21:56,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:56,260 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:21:56,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:58,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376031604] [2024-11-28 03:21:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376031604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322451726] [2024-11-28 03:21:58,021 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:21:58,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:58,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:58,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:21:58,159 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:21:58,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:58,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 03:21:58,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:59,077 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 03:21:59,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:59,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:59,862 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 40 treesize of output 32 [2024-11-28 03:22:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:22:00,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322451726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:00,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:00,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 43 [2024-11-28 03:22:00,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36286397] [2024-11-28 03:22:00,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:00,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 03:22:00,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:00,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 03:22:00,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 03:22:00,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:22:00,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1276 transitions, 24722 flow. Second operand has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 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 03:22:00,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:22:00,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:22:00,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:22:07,348 INFO L124 PetriNetUnfolderBase]: 4876/8755 cut-off events. [2024-11-28 03:22:07,348 INFO L125 PetriNetUnfolderBase]: For 143430/143430 co-relation queries the response was YES. [2024-11-28 03:22:07,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74889 conditions, 8755 events. 4876/8755 cut-off events. For 143430/143430 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62026 event pairs, 338 based on Foata normal form. 4/8759 useless extension candidates. Maximal degree in co-relation 74764. Up to 5471 conditions per place. [2024-11-28 03:22:07,676 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 714 selfloop transitions, 684 changer transitions 15/1414 dead transitions. [2024-11-28 03:22:07,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1414 transitions, 28774 flow [2024-11-28 03:22:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:22:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 03:22:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 293 transitions. [2024-11-28 03:22:07,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28866995073891627 [2024-11-28 03:22:07,679 INFO L175 Difference]: Start difference. First operand has 521 places, 1276 transitions, 24722 flow. Second operand 35 states and 293 transitions. [2024-11-28 03:22:07,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1414 transitions, 28774 flow [2024-11-28 03:22:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 1414 transitions, 27505 flow, removed 517 selfloop flow, removed 25 redundant places. [2024-11-28 03:22:11,267 INFO L231 Difference]: Finished difference. Result has 531 places, 1294 transitions, 26275 flow [2024-11-28 03:22:11,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23537, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=663, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=26275, PETRI_PLACES=531, PETRI_TRANSITIONS=1294} [2024-11-28 03:22:11,268 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 503 predicate places. [2024-11-28 03:22:11,268 INFO L471 AbstractCegarLoop]: Abstraction has has 531 places, 1294 transitions, 26275 flow [2024-11-28 03:22:11,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 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 03:22:11,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:22:11,269 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] [2024-11-28 03:22:11,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:22:11,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:11,469 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:22:11,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1802037981, now seen corresponding path program 7 times [2024-11-28 03:22:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:11,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939429916] [2024-11-28 03:22:11,470 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:22:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:22:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939429916] [2024-11-28 03:22:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939429916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658443657] [2024-11-28 03:22:12,964 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:22:12,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:12,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:12,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:12,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:22:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:22:13,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:22:13,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:14,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:15,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:15,739 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 32 treesize of output 24 [2024-11-28 03:22:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658443657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:16,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:16,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-11-28 03:22:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449880933] [2024-11-28 03:22:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:16,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 03:22:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:16,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 03:22:16,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:22:16,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:22:16,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1294 transitions, 26275 flow. Second operand has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:22:16,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:22:16,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:22:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:22:30,077 INFO L124 PetriNetUnfolderBase]: 4899/8780 cut-off events. [2024-11-28 03:22:30,077 INFO L125 PetriNetUnfolderBase]: For 155075/155075 co-relation queries the response was YES. [2024-11-28 03:22:30,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78217 conditions, 8780 events. 4899/8780 cut-off events. For 155075/155075 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 61942 event pairs, 257 based on Foata normal form. 4/8784 useless extension candidates. Maximal degree in co-relation 78090. Up to 4725 conditions per place. [2024-11-28 03:22:30,280 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 479 selfloop transitions, 1007 changer transitions 15/1502 dead transitions. [2024-11-28 03:22:30,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1502 transitions, 31001 flow [2024-11-28 03:22:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 03:22:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-28 03:22:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 559 transitions. [2024-11-28 03:22:30,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27536945812807884 [2024-11-28 03:22:30,283 INFO L175 Difference]: Start difference. First operand has 531 places, 1294 transitions, 26275 flow. Second operand 70 states and 559 transitions. [2024-11-28 03:22:30,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1502 transitions, 31001 flow [2024-11-28 03:22:34,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 1502 transitions, 30727 flow, removed 38 selfloop flow, removed 23 redundant places. [2024-11-28 03:22:34,281 INFO L231 Difference]: Finished difference. Result has 584 places, 1337 transitions, 30059 flow [2024-11-28 03:22:34,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26004, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=965, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=30059, PETRI_PLACES=584, PETRI_TRANSITIONS=1337} [2024-11-28 03:22:34,282 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 556 predicate places. [2024-11-28 03:22:34,283 INFO L471 AbstractCegarLoop]: Abstraction has has 584 places, 1337 transitions, 30059 flow [2024-11-28 03:22:34,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:22:34,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:22:34,283 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] [2024-11-28 03:22:34,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:22:34,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:22:34,484 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:22:34,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 251117347, now seen corresponding path program 8 times [2024-11-28 03:22:34,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:34,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965068867] [2024-11-28 03:22:34,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:22:34,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:34,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:22:34,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:35,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:35,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965068867] [2024-11-28 03:22:35,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965068867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:35,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85909319] [2024-11-28 03:22:35,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:22:35,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:35,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:36,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:36,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:22:36,140 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:22:36,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:36,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:22:36,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:37,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:38,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:38,315 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 43 treesize of output 35 [2024-11-28 03:22:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:39,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85909319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:39,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:39,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 48 [2024-11-28 03:22:39,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190462269] [2024-11-28 03:22:39,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:39,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 03:22:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:39,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 03:22:39,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 03:22:39,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:22:39,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 1337 transitions, 30059 flow. Second operand has 49 states, 49 states have (on average 4.571428571428571) internal successors, (224), 49 states have internal predecessors, (224), 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 03:22:39,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:22:39,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:22:39,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:22:48,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:23:02,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:23:07,478 INFO L124 PetriNetUnfolderBase]: 4883/8736 cut-off events. [2024-11-28 03:23:07,478 INFO L125 PetriNetUnfolderBase]: For 196357/196357 co-relation queries the response was YES. [2024-11-28 03:23:07,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84416 conditions, 8736 events. 4883/8736 cut-off events. For 196357/196357 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 61488 event pairs, 272 based on Foata normal form. 4/8740 useless extension candidates. Maximal degree in co-relation 84283. Up to 3939 conditions per place. [2024-11-28 03:23:07,657 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 616 selfloop transitions, 899 changer transitions 24/1540 dead transitions. [2024-11-28 03:23:07,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1540 transitions, 34820 flow [2024-11-28 03:23:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 03:23:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-28 03:23:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 559 transitions. [2024-11-28 03:23:07,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27536945812807884 [2024-11-28 03:23:07,660 INFO L175 Difference]: Start difference. First operand has 584 places, 1337 transitions, 30059 flow. Second operand 70 states and 559 transitions. [2024-11-28 03:23:07,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1540 transitions, 34820 flow [2024-11-28 03:23:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1540 transitions, 34294 flow, removed 72 selfloop flow, removed 41 redundant places. [2024-11-28 03:23:11,618 INFO L231 Difference]: Finished difference. Result has 614 places, 1349 transitions, 32475 flow [2024-11-28 03:23:11,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=29539, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=32475, PETRI_PLACES=614, PETRI_TRANSITIONS=1349} [2024-11-28 03:23:11,620 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 586 predicate places. [2024-11-28 03:23:11,620 INFO L471 AbstractCegarLoop]: Abstraction has has 614 places, 1349 transitions, 32475 flow [2024-11-28 03:23:11,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.571428571428571) internal successors, (224), 49 states have internal predecessors, (224), 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 03:23:11,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:23:11,621 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] [2024-11-28 03:23:11,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:23:11,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:23:11,822 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:23:11,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:23:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1569552747, now seen corresponding path program 9 times [2024-11-28 03:23:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:23:11,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663088577] [2024-11-28 03:23:11,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:23:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:23:11,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:23:11,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:23:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663088577] [2024-11-28 03:23:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663088577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:23:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216932849] [2024-11-28 03:23:13,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:23:13,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:23:13,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:23:13,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:23:13,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:23:13,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:23:13,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:13,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:23:13,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:23:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:14,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:23:16,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:23:16,121 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 43 treesize of output 35 [2024-11-28 03:23:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216932849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:23:17,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:23:17,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-11-28 03:23:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746943758] [2024-11-28 03:23:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:23:17,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 03:23:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:23:17,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 03:23:17,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:23:17,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:23:17,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1349 transitions, 32475 flow. Second operand has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:23:17,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:23:17,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:23:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:23:34,287 INFO L124 PetriNetUnfolderBase]: 4990/8944 cut-off events. [2024-11-28 03:23:34,288 INFO L125 PetriNetUnfolderBase]: For 222934/222934 co-relation queries the response was YES. [2024-11-28 03:23:34,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91048 conditions, 8944 events. 4990/8944 cut-off events. For 222934/222934 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 63399 event pairs, 292 based on Foata normal form. 5/8949 useless extension candidates. Maximal degree in co-relation 90913. Up to 5352 conditions per place. [2024-11-28 03:23:34,477 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 686 selfloop transitions, 869 changer transitions 37/1593 dead transitions. [2024-11-28 03:23:34,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 1593 transitions, 38461 flow [2024-11-28 03:23:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 03:23:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-11-28 03:23:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 599 transitions. [2024-11-28 03:23:34,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2754022988505747 [2024-11-28 03:23:34,480 INFO L175 Difference]: Start difference. First operand has 614 places, 1349 transitions, 32475 flow. Second operand 75 states and 599 transitions. [2024-11-28 03:23:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 1593 transitions, 38461 flow [2024-11-28 03:23:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1593 transitions, 37584 flow, removed 20 selfloop flow, removed 54 redundant places. [2024-11-28 03:23:39,698 INFO L231 Difference]: Finished difference. Result has 636 places, 1398 transitions, 35930 flow [2024-11-28 03:23:39,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=31640, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=35930, PETRI_PLACES=636, PETRI_TRANSITIONS=1398} [2024-11-28 03:23:39,699 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 608 predicate places. [2024-11-28 03:23:39,699 INFO L471 AbstractCegarLoop]: Abstraction has has 636 places, 1398 transitions, 35930 flow [2024-11-28 03:23:39,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:23:39,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:23:39,700 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] [2024-11-28 03:23:39,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:23:39,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:23:39,900 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:23:39,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:23:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash -489831567, now seen corresponding path program 10 times [2024-11-28 03:23:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:23:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368773957] [2024-11-28 03:23:39,901 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:23:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:23:39,919 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:23:39,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:23:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368773957] [2024-11-28 03:23:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368773957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:23:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722566114] [2024-11-28 03:23:41,276 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:23:41,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:23:41,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:23:41,278 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:23:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:23:41,407 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:23:41,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:41,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:23:41,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:23:42,315 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 11 treesize of output 3 [2024-11-28 03:23:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:42,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:23:44,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:23:44,211 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 43 treesize of output 35 [2024-11-28 03:23:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722566114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:23:45,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:23:45,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-11-28 03:23:45,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043206279] [2024-11-28 03:23:45,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:23:45,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 03:23:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:23:45,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 03:23:45,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:23:45,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:23:45,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1398 transitions, 35930 flow. Second operand has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:23:45,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:23:45,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:23:45,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:24:29,798 INFO L124 PetriNetUnfolderBase]: 9315/16562 cut-off events. [2024-11-28 03:24:29,798 INFO L125 PetriNetUnfolderBase]: For 618108/618108 co-relation queries the response was YES. [2024-11-28 03:24:30,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186580 conditions, 16562 events. 9315/16562 cut-off events. For 618108/618108 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 128762 event pairs, 362 based on Foata normal form. 281/16843 useless extension candidates. Maximal degree in co-relation 186440. Up to 5841 conditions per place. [2024-11-28 03:24:30,369 INFO L140 encePairwiseOnDemand]: 12/29 looper letters, 894 selfloop transitions, 1787 changer transitions 263/2945 dead transitions. [2024-11-28 03:24:30,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 2945 transitions, 76562 flow [2024-11-28 03:24:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2024-11-28 03:24:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2024-11-28 03:24:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 1615 transitions. [2024-11-28 03:24:30,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2994067482387838 [2024-11-28 03:24:30,374 INFO L175 Difference]: Start difference. First operand has 636 places, 1398 transitions, 35930 flow. Second operand 186 states and 1615 transitions. [2024-11-28 03:24:30,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 2945 transitions, 76562 flow [2024-11-28 03:24:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 2945 transitions, 74823 flow, removed 197 selfloop flow, removed 38 redundant places. [2024-11-28 03:24:41,145 INFO L231 Difference]: Finished difference. Result has 854 places, 2291 transitions, 68440 flow [2024-11-28 03:24:41,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=33740, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=967, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=68440, PETRI_PLACES=854, PETRI_TRANSITIONS=2291} [2024-11-28 03:24:41,147 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 826 predicate places. [2024-11-28 03:24:41,147 INFO L471 AbstractCegarLoop]: Abstraction has has 854 places, 2291 transitions, 68440 flow [2024-11-28 03:24:41,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:24:41,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:24:41,147 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] [2024-11-28 03:24:41,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:24:41,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:41,348 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:24:41,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:24:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1224829223, now seen corresponding path program 11 times [2024-11-28 03:24:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:24:41,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627126727] [2024-11-28 03:24:41,349 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:24:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:24:41,366 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:24:41,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:24:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:42,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:24:42,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627126727] [2024-11-28 03:24:42,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627126727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:24:42,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234197282] [2024-11-28 03:24:42,508 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:24:42,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:24:42,510 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:24:42,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:24:42,615 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:24:42,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:24:42,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 03:24:42,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:24:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:24:43,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:24:44,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:24:44,100 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 40 treesize of output 32 [2024-11-28 03:24:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:24:44,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234197282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:24:44,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:24:44,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 44 [2024-11-28 03:24:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96874489] [2024-11-28 03:24:44,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:24:44,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 03:24:44,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:24:44,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 03:24:44,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 03:24:44,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:24:44,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 2291 transitions, 68440 flow. Second operand has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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 03:24:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:24:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:24:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:25:02,388 INFO L124 PetriNetUnfolderBase]: 8738/15695 cut-off events. [2024-11-28 03:25:02,388 INFO L125 PetriNetUnfolderBase]: For 902984/902984 co-relation queries the response was YES. [2024-11-28 03:25:02,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204475 conditions, 15695 events. 8738/15695 cut-off events. For 902984/902984 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 122424 event pairs, 627 based on Foata normal form. 5/15700 useless extension candidates. Maximal degree in co-relation 204260. Up to 10109 conditions per place. [2024-11-28 03:25:02,893 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 1173 selfloop transitions, 1227 changer transitions 27/2428 dead transitions. [2024-11-28 03:25:02,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 847 places, 2428 transitions, 75689 flow [2024-11-28 03:25:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:25:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:25:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 232 transitions. [2024-11-28 03:25:02,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2962962962962963 [2024-11-28 03:25:02,895 INFO L175 Difference]: Start difference. First operand has 854 places, 2291 transitions, 68440 flow. Second operand 27 states and 232 transitions. [2024-11-28 03:25:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 847 places, 2428 transitions, 75689 flow [2024-11-28 03:25:26,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 2428 transitions, 71110 flow, removed 2122 selfloop flow, removed 55 redundant places. [2024-11-28 03:25:26,262 INFO L231 Difference]: Finished difference. Result has 801 places, 2308 transitions, 69052 flow [2024-11-28 03:25:26,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64194, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=69052, PETRI_PLACES=801, PETRI_TRANSITIONS=2308} [2024-11-28 03:25:26,264 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 773 predicate places. [2024-11-28 03:25:26,264 INFO L471 AbstractCegarLoop]: Abstraction has has 801 places, 2308 transitions, 69052 flow [2024-11-28 03:25:26,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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 03:25:26,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:25:26,264 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] [2024-11-28 03:25:26,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:25:26,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:25:26,465 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:25:26,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:25:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1427780015, now seen corresponding path program 12 times [2024-11-28 03:25:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:25:26,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886476590] [2024-11-28 03:25:26,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:25:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:25:26,486 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:25:26,486 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:27,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:25:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886476590] [2024-11-28 03:25:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886476590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:25:27,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629829264] [2024-11-28 03:25:27,824 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:25:27,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:25:27,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:25:27,826 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:25:27,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:25:27,948 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:25:27,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:27,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:25:27,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:25:28,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:25:28,597 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 23 treesize of output 15 [2024-11-28 03:25:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:29,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:25:30,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:25:30,562 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 43 treesize of output 35 [2024-11-28 03:25:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629829264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:25:31,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:25:31,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-11-28 03:25:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288242239] [2024-11-28 03:25:31,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:25:31,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 03:25:31,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:25:31,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 03:25:31,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:25:31,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:25:31,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2308 transitions, 69052 flow. Second operand has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:25:31,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:25:31,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:25:31,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:26:09,127 INFO L124 PetriNetUnfolderBase]: 10256/18339 cut-off events. [2024-11-28 03:26:09,127 INFO L125 PetriNetUnfolderBase]: For 1080306/1080306 co-relation queries the response was YES. [2024-11-28 03:26:09,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234887 conditions, 18339 events. 10256/18339 cut-off events. For 1080306/1080306 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 146600 event pairs, 581 based on Foata normal form. 7/18344 useless extension candidates. Maximal degree in co-relation 234683. Up to 8746 conditions per place. [2024-11-28 03:26:09,545 INFO L140 encePairwiseOnDemand]: 12/29 looper letters, 1022 selfloop transitions, 2241 changer transitions 46/3310 dead transitions. [2024-11-28 03:26:09,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 3310 transitions, 104023 flow [2024-11-28 03:26:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-28 03:26:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2024-11-28 03:26:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 885 transitions. [2024-11-28 03:26:09,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2749301025163094 [2024-11-28 03:26:09,547 INFO L175 Difference]: Start difference. First operand has 801 places, 2308 transitions, 69052 flow. Second operand 111 states and 885 transitions. [2024-11-28 03:26:09,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 3310 transitions, 104023 flow [2024-11-28 03:26:32,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 3310 transitions, 103129 flow, removed 59 selfloop flow, removed 15 redundant places. [2024-11-28 03:26:32,197 INFO L231 Difference]: Finished difference. Result has 925 places, 3034 transitions, 101646 flow [2024-11-28 03:26:32,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=68385, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=101646, PETRI_PLACES=925, PETRI_TRANSITIONS=3034} [2024-11-28 03:26:32,199 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 897 predicate places. [2024-11-28 03:26:32,199 INFO L471 AbstractCegarLoop]: Abstraction has has 925 places, 3034 transitions, 101646 flow [2024-11-28 03:26:32,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.56) internal successors, (228), 50 states have internal predecessors, (228), 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 03:26:32,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:26:32,199 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] [2024-11-28 03:26:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:26:32,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:26:32,400 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:26:32,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:26:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1090268071, now seen corresponding path program 13 times [2024-11-28 03:26:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:26:32,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851631185] [2024-11-28 03:26:32,401 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:26:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:26:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:26:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:26:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851631185] [2024-11-28 03:26:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851631185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:26:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77210248] [2024-11-28 03:26:33,395 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:26:33,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:26:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:26:33,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:26:33,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2cd8c0-be96-4804-a5f7-303dd5455f6f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:26:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:26:33,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:26:33,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:26:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:34,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:26:35,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:26:35,752 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 43 treesize of output 35 [2024-11-28 03:26:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:36,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77210248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:26:36,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:26:36,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-11-28 03:26:36,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252949330] [2024-11-28 03:26:36,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:26:36,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:26:36,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:26:36,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:26:36,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2294, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:26:36,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-11-28 03:26:36,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 3034 transitions, 101646 flow. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 states have internal predecessors, (231), 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 03:26:36,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:26:36,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-11-28 03:26:36,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand