./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/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 0d53ec9655ee282673b712b4a154821b0baa87dd23720a53d10f4e3f8ec015d6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:22:30,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:22:30,134 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:22:30,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:22:30,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:22:30,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:22:30,164 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:22:30,165 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:22:30,165 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:22:30,165 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:22:30,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:22:30,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:22:30,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:22:30,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:22:30,166 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:22:30,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:22:30,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:22:30,167 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:22:30,168 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:22:30,169 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:22:30,169 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:30,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:30,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:22:30,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:22:30,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:22:30,171 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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/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 -> 0d53ec9655ee282673b712b4a154821b0baa87dd23720a53d10f4e3f8ec015d6 [2024-11-27 23:22:30,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:22:30,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:22:30,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:22:30,490 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:22:30,490 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:22:30,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-11-27 23:22:33,371 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/data/e68ca4ac8/7d38b42804ef4a2fbe513a664d3f2910/FLAGbb2e333f1 [2024-11-27 23:22:33,673 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:22:33,674 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2024-11-27 23:22:33,687 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/data/e68ca4ac8/7d38b42804ef4a2fbe513a664d3f2910/FLAGbb2e333f1 [2024-11-27 23:22:33,709 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/data/e68ca4ac8/7d38b42804ef4a2fbe513a664d3f2910 [2024-11-27 23:22:33,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:22:33,714 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:22:33,715 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:22:33,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:22:33,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:22:33,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:33,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fef4a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33, skipping insertion in model container [2024-11-27 23:22:33,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:33,741 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:22:33,938 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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[1946,1959] [2024-11-27 23:22:33,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:22:33,952 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:22:33,977 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_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[1946,1959] [2024-11-27 23:22:33,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:22:33,999 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:22:33,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33 WrapperNode [2024-11-27 23:22:34,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:22:34,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:22:34,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:22:34,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:22:34,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,016 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,036 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 61 [2024-11-27 23:22:34,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:22:34,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:22:34,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:22:34,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:22:34,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,068 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 23:22:34,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,071 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,074 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,076 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:22:34,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:22:34,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:22:34,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:22:34,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (1/1) ... [2024-11-27 23:22:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:34,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:22:34,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:22:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:22:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:22:34,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:22:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:22:34,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:22:34,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:22:34,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:22:34,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:22:34,146 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:22:34,239 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:22:34,242 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:22:34,441 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:22:34,442 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:22:34,615 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:22:34,615 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 23:22:34,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:22:34 BoogieIcfgContainer [2024-11-27 23:22:34,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:22:34,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:22:34,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:22:34,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:22:34,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:22:33" (1/3) ... [2024-11-27 23:22:34,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479ffc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:22:34, skipping insertion in model container [2024-11-27 23:22:34,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:33" (2/3) ... [2024-11-27 23:22:34,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479ffc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:22:34, skipping insertion in model container [2024-11-27 23:22:34,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:22:34" (3/3) ... [2024-11-27 23:22:34,626 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-11-27 23:22:34,647 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:22:34,648 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-figure3.wvr.c that has 3 procedures, 21 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 23:22:34,648 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:22:34,717 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 23:22:34,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-27 23:22:34,796 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-27 23:22:34,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:22:34,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-27 23:22:34,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-27 23:22:34,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-27 23:22:34,831 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:22:34,848 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;@2be87df5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:22:34,850 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-27 23:22:34,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:22:34,869 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-27 23:22:34,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:22:34,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:34,870 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:34,872 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:34,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 668271363, now seen corresponding path program 1 times [2024-11-27 23:22:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065644816] [2024-11-27 23:22:34,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:35,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065644816] [2024-11-27 23:22:35,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065644816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:22:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132993093] [2024-11-27 23:22:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:35,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:22:35,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:35,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:22:35,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:35,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-27 23:22:35,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:35,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:35,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-27 23:22:35,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:35,491 INFO L124 PetriNetUnfolderBase]: 86/169 cut-off events. [2024-11-27 23:22:35,491 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-27 23:22:35,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 169 events. 86/169 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 502 event pairs, 32 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 298. Up to 108 conditions per place. [2024-11-27 23:22:35,501 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-27 23:22:35,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 129 flow [2024-11-27 23:22:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:22:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:22:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-27 23:22:35,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-27 23:22:35,521 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 40 transitions. [2024-11-27 23:22:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 129 flow [2024-11-27 23:22:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 23:22:35,533 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-11-27 23:22:35,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-27 23:22:35,541 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-11-27 23:22:35,541 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-11-27 23:22:35,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:35,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:35,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:35,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:22:35,542 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:35,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash -90181149, now seen corresponding path program 1 times [2024-11-27 23:22:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:35,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293000681] [2024-11-27 23:22:35,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:35,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293000681] [2024-11-27 23:22:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293000681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:35,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:35,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:22:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407138098] [2024-11-27 23:22:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:35,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:22:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:35,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:22:35,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:22:35,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:35,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:35,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:35,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:35,953 INFO L124 PetriNetUnfolderBase]: 98/200 cut-off events. [2024-11-27 23:22:35,953 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-27 23:22:35,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 200 events. 98/200 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 745 event pairs, 45 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 155. Up to 133 conditions per place. [2024-11-27 23:22:35,955 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 6 changer transitions 1/39 dead transitions. [2024-11-27 23:22:35,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 170 flow [2024-11-27 23:22:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:22:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:22:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-11-27 23:22:35,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-11-27 23:22:35,957 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 61 transitions. [2024-11-27 23:22:35,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 170 flow [2024-11-27 23:22:35,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:22:35,959 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 97 flow [2024-11-27 23:22:35,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-11-27 23:22:35,960 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-27 23:22:35,960 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 97 flow [2024-11-27 23:22:35,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:35,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:35,961 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:35,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:22:35,961 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:35,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash 753028643, now seen corresponding path program 2 times [2024-11-27 23:22:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764699465] [2024-11-27 23:22:35,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:22:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:35,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:35,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:36,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764699465] [2024-11-27 23:22:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764699465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:22:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510205191] [2024-11-27 23:22:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:36,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:22:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:36,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:22:36,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:22:36,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:36,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:36,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:36,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:36,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:36,217 INFO L124 PetriNetUnfolderBase]: 112/233 cut-off events. [2024-11-27 23:22:36,217 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2024-11-27 23:22:36,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 233 events. 112/233 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 22 based on Foata normal form. 7/224 useless extension candidates. Maximal degree in co-relation 416. Up to 119 conditions per place. [2024-11-27 23:22:36,221 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 28 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-11-27 23:22:36,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 203 flow [2024-11-27 23:22:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:22:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:22:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-11-27 23:22:36,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-11-27 23:22:36,223 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 97 flow. Second operand 4 states and 50 transitions. [2024-11-27 23:22:36,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 203 flow [2024-11-27 23:22:36,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 201 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-27 23:22:36,226 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 128 flow [2024-11-27 23:22:36,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-11-27 23:22:36,227 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2024-11-27 23:22:36,228 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 128 flow [2024-11-27 23:22:36,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:36,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:36,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:36,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:22:36,229 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:36,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1762651415, now seen corresponding path program 3 times [2024-11-27 23:22:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:36,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073188514] [2024-11-27 23:22:36,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:22:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:36,258 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:22:36,259 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:36,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:36,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073188514] [2024-11-27 23:22:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073188514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:36,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:36,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:22:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563785852] [2024-11-27 23:22:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:36,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:22:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:36,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:22:36,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:22:36,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:36,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:36,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:36,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:36,521 INFO L124 PetriNetUnfolderBase]: 149/302 cut-off events. [2024-11-27 23:22:36,521 INFO L125 PetriNetUnfolderBase]: For 380/382 co-relation queries the response was YES. [2024-11-27 23:22:36,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 302 events. 149/302 cut-off events. For 380/382 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1176 event pairs, 55 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 428. Up to 137 conditions per place. [2024-11-27 23:22:36,529 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 34 selfloop transitions, 7 changer transitions 1/46 dead transitions. [2024-11-27 23:22:36,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 292 flow [2024-11-27 23:22:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:22:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:22:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-11-27 23:22:36,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-11-27 23:22:36,532 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 128 flow. Second operand 4 states and 53 transitions. [2024-11-27 23:22:36,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 292 flow [2024-11-27 23:22:36,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 280 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-27 23:22:36,541 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 159 flow [2024-11-27 23:22:36,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-11-27 23:22:36,543 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2024-11-27 23:22:36,543 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 159 flow [2024-11-27 23:22:36,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:36,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:36,544 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:36,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:22:36,545 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:36,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1110489459, now seen corresponding path program 4 times [2024-11-27 23:22:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:36,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104718905] [2024-11-27 23:22:36,549 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:36,573 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:36,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104718905] [2024-11-27 23:22:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104718905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423039180] [2024-11-27 23:22:36,809 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:36,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:36,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:22:36,880 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:36,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:36,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:22:36,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:36,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423039180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:37,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 9 [2024-11-27 23:22:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902922304] [2024-11-27 23:22:37,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:37,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:22:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:37,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:22:37,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:22:37,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:37,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 159 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:37,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:37,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:37,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:37,576 INFO L124 PetriNetUnfolderBase]: 282/555 cut-off events. [2024-11-27 23:22:37,576 INFO L125 PetriNetUnfolderBase]: For 1048/1052 co-relation queries the response was YES. [2024-11-27 23:22:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 555 events. 282/555 cut-off events. For 1048/1052 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2658 event pairs, 35 based on Foata normal form. 17/570 useless extension candidates. Maximal degree in co-relation 1097. Up to 177 conditions per place. [2024-11-27 23:22:37,586 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 48 selfloop transitions, 41 changer transitions 2/95 dead transitions. [2024-11-27 23:22:37,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 95 transitions, 659 flow [2024-11-27 23:22:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:22:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:22:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-11-27 23:22:37,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5174825174825175 [2024-11-27 23:22:37,588 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 159 flow. Second operand 13 states and 148 transitions. [2024-11-27 23:22:37,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 95 transitions, 659 flow [2024-11-27 23:22:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 95 transitions, 636 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-27 23:22:37,600 INFO L231 Difference]: Finished difference. Result has 57 places, 64 transitions, 516 flow [2024-11-27 23:22:37,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=516, PETRI_PLACES=57, PETRI_TRANSITIONS=64} [2024-11-27 23:22:37,601 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 33 predicate places. [2024-11-27 23:22:37,603 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 64 transitions, 516 flow [2024-11-27 23:22:37,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:37,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:37,603 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:37,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:22:37,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:37,808 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:37,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1164781193, now seen corresponding path program 5 times [2024-11-27 23:22:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728389698] [2024-11-27 23:22:37,809 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:22:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:37,835 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 23:22:37,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728389698] [2024-11-27 23:22:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728389698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:37,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:22:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070952689] [2024-11-27 23:22:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:37,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:22:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:37,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:22:37,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:22:37,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:37,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:37,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:37,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:37,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:38,134 INFO L124 PetriNetUnfolderBase]: 268/523 cut-off events. [2024-11-27 23:22:38,134 INFO L125 PetriNetUnfolderBase]: For 2718/2718 co-relation queries the response was YES. [2024-11-27 23:22:38,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 523 events. 268/523 cut-off events. For 2718/2718 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2410 event pairs, 63 based on Foata normal form. 2/522 useless extension candidates. Maximal degree in co-relation 1813. Up to 242 conditions per place. [2024-11-27 23:22:38,141 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 54 selfloop transitions, 20 changer transitions 1/79 dead transitions. [2024-11-27 23:22:38,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 769 flow [2024-11-27 23:22:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:22:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:22:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-11-27 23:22:38,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-27 23:22:38,142 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 516 flow. Second operand 5 states and 58 transitions. [2024-11-27 23:22:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 769 flow [2024-11-27 23:22:38,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 698 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-27 23:22:38,156 INFO L231 Difference]: Finished difference. Result has 60 places, 67 transitions, 529 flow [2024-11-27 23:22:38,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=60, PETRI_TRANSITIONS=67} [2024-11-27 23:22:38,156 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 36 predicate places. [2024-11-27 23:22:38,156 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 67 transitions, 529 flow [2024-11-27 23:22:38,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:38,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:38,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:38,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:22:38,157 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:38,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash -84981465, now seen corresponding path program 6 times [2024-11-27 23:22:38,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:38,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437224591] [2024-11-27 23:22:38,158 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:22:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:38,173 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:22:38,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:38,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:38,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437224591] [2024-11-27 23:22:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437224591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:38,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:38,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:22:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238467573] [2024-11-27 23:22:38,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:38,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:22:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:38,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:22:38,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:22:38,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:38,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 67 transitions, 529 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:38,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:38,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:38,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:38,426 INFO L124 PetriNetUnfolderBase]: 266/517 cut-off events. [2024-11-27 23:22:38,426 INFO L125 PetriNetUnfolderBase]: For 2713/2713 co-relation queries the response was YES. [2024-11-27 23:22:38,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 517 events. 266/517 cut-off events. For 2713/2713 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2339 event pairs, 59 based on Foata normal form. 7/521 useless extension candidates. Maximal degree in co-relation 1824. Up to 226 conditions per place. [2024-11-27 23:22:38,436 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 52 selfloop transitions, 24 changer transitions 0/80 dead transitions. [2024-11-27 23:22:38,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 738 flow [2024-11-27 23:22:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:22:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:22:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-11-27 23:22:38,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-11-27 23:22:38,439 INFO L175 Difference]: Start difference. First operand has 60 places, 67 transitions, 529 flow. Second operand 4 states and 51 transitions. [2024-11-27 23:22:38,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 738 flow [2024-11-27 23:22:38,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 680 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-27 23:22:38,452 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 535 flow [2024-11-27 23:22:38,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2024-11-27 23:22:38,454 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 33 predicate places. [2024-11-27 23:22:38,454 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 535 flow [2024-11-27 23:22:38,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:38,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:38,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:38,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:22:38,456 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:38,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1498769042, now seen corresponding path program 1 times [2024-11-27 23:22:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025564148] [2024-11-27 23:22:38,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:38,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025564148] [2024-11-27 23:22:38,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025564148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272653357] [2024-11-27 23:22:38,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:38,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:38,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:38,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:38,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:22:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:38,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:22:38,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:38,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272653357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:38,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-11-27 23:22:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883921583] [2024-11-27 23:22:38,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:38,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:22:38,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:38,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:22:38,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:22:38,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-27 23:22:38,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 535 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:38,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:38,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-27 23:22:38,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:39,025 INFO L124 PetriNetUnfolderBase]: 560/1027 cut-off events. [2024-11-27 23:22:39,025 INFO L125 PetriNetUnfolderBase]: For 3927/3950 co-relation queries the response was YES. [2024-11-27 23:22:39,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1027 events. 560/1027 cut-off events. For 3927/3950 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5069 event pairs, 88 based on Foata normal form. 12/1038 useless extension candidates. Maximal degree in co-relation 2707. Up to 481 conditions per place. [2024-11-27 23:22:39,033 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 98 selfloop transitions, 5 changer transitions 16/127 dead transitions. [2024-11-27 23:22:39,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 127 transitions, 1205 flow [2024-11-27 23:22:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:22:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 23:22:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-27 23:22:39,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-27 23:22:39,035 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 535 flow. Second operand 4 states and 60 transitions. [2024-11-27 23:22:39,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 127 transitions, 1205 flow [2024-11-27 23:22:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 127 transitions, 1172 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:22:39,046 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 526 flow [2024-11-27 23:22:39,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=526, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-11-27 23:22:39,047 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 37 predicate places. [2024-11-27 23:22:39,047 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 526 flow [2024-11-27 23:22:39,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:39,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:39,047 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:39,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:22:39,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:39,248 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:39,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1423952418, now seen corresponding path program 2 times [2024-11-27 23:22:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655891653] [2024-11-27 23:22:39,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:22:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:39,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:39,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:39,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:39,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655891653] [2024-11-27 23:22:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655891653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673744211] [2024-11-27 23:22:39,565 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:22:39,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:39,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:39,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:39,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:22:39,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:39,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:39,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:39,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:39,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:39,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673744211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:39,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:39,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2024-11-27 23:22:39,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38339850] [2024-11-27 23:22:39,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:39,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:22:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:39,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:22:39,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:22:39,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:39,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 526 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:39,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:39,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:42,785 INFO L124 PetriNetUnfolderBase]: 850/1584 cut-off events. [2024-11-27 23:22:42,785 INFO L125 PetriNetUnfolderBase]: For 7046/7070 co-relation queries the response was YES. [2024-11-27 23:22:42,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 1584 events. 850/1584 cut-off events. For 7046/7070 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8542 event pairs, 46 based on Foata normal form. 70/1644 useless extension candidates. Maximal degree in co-relation 3442. Up to 376 conditions per place. [2024-11-27 23:22:42,801 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 87 selfloop transitions, 139 changer transitions 3/236 dead transitions. [2024-11-27 23:22:42,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 236 transitions, 2167 flow [2024-11-27 23:22:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:22:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-27 23:22:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 362 transitions. [2024-11-27 23:22:42,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-11-27 23:22:42,805 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 526 flow. Second operand 36 states and 362 transitions. [2024-11-27 23:22:42,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 236 transitions, 2167 flow [2024-11-27 23:22:42,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 236 transitions, 2167 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 23:22:42,823 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1821 flow [2024-11-27 23:22:42,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1821, PETRI_PLACES=114, PETRI_TRANSITIONS=163} [2024-11-27 23:22:42,824 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 90 predicate places. [2024-11-27 23:22:42,824 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1821 flow [2024-11-27 23:22:42,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:42,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:42,825 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:42,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:22:43,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:43,025 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:43,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1822060612, now seen corresponding path program 3 times [2024-11-27 23:22:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:43,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579220490] [2024-11-27 23:22:43,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:22:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:43,049 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:22:43,049 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:43,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:43,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579220490] [2024-11-27 23:22:43,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579220490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:43,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131136643] [2024-11-27 23:22:43,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:22:43,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:43,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:43,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:43,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:22:43,402 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:22:43,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:43,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:43,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:43,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131136643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:43,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2024-11-27 23:22:43,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263729070] [2024-11-27 23:22:43,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:43,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:22:43,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:43,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:22:43,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:22:43,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 163 transitions, 1821 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:44,614 INFO L124 PetriNetUnfolderBase]: 916/1711 cut-off events. [2024-11-27 23:22:44,615 INFO L125 PetriNetUnfolderBase]: For 19944/19964 co-relation queries the response was YES. [2024-11-27 23:22:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9809 conditions, 1711 events. 916/1711 cut-off events. For 19944/19964 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9563 event pairs, 143 based on Foata normal form. 20/1721 useless extension candidates. Maximal degree in co-relation 8481. Up to 743 conditions per place. [2024-11-27 23:22:44,635 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 120 selfloop transitions, 96 changer transitions 10/233 dead transitions. [2024-11-27 23:22:44,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 233 transitions, 3024 flow [2024-11-27 23:22:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:22:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-27 23:22:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 196 transitions. [2024-11-27 23:22:44,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-11-27 23:22:44,637 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1821 flow. Second operand 20 states and 196 transitions. [2024-11-27 23:22:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 233 transitions, 3024 flow [2024-11-27 23:22:44,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 233 transitions, 2684 flow, removed 154 selfloop flow, removed 5 redundant places. [2024-11-27 23:22:44,724 INFO L231 Difference]: Finished difference. Result has 137 places, 185 transitions, 2134 flow [2024-11-27 23:22:44,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2134, PETRI_PLACES=137, PETRI_TRANSITIONS=185} [2024-11-27 23:22:44,725 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 113 predicate places. [2024-11-27 23:22:44,725 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 185 transitions, 2134 flow [2024-11-27 23:22:44,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:44,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:44,725 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:44,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:22:44,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:22:44,926 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:44,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash -431499432, now seen corresponding path program 4 times [2024-11-27 23:22:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588318495] [2024-11-27 23:22:44,927 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:44,943 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:44,943 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588318495] [2024-11-27 23:22:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588318495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270539588] [2024-11-27 23:22:45,299 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:45,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:45,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:22:45,359 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:45,359 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:45,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:45,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:45,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:45,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270539588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:45,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:45,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-11-27 23:22:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266702786] [2024-11-27 23:22:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:45,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:22:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:45,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:22:45,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:22:45,673 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:45,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 185 transitions, 2134 flow. Second operand has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:45,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:45,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:45,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:47,175 INFO L124 PetriNetUnfolderBase]: 1237/2263 cut-off events. [2024-11-27 23:22:47,175 INFO L125 PetriNetUnfolderBase]: For 31852/31868 co-relation queries the response was YES. [2024-11-27 23:22:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 2263 events. 1237/2263 cut-off events. For 31852/31868 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13158 event pairs, 29 based on Foata normal form. 38/2287 useless extension candidates. Maximal degree in co-relation 12784. Up to 471 conditions per place. [2024-11-27 23:22:47,202 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 120 selfloop transitions, 242 changer transitions 0/369 dead transitions. [2024-11-27 23:22:47,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 369 transitions, 4873 flow [2024-11-27 23:22:47,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 23:22:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-27 23:22:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 269 transitions. [2024-11-27 23:22:47,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47027972027972026 [2024-11-27 23:22:47,206 INFO L175 Difference]: Start difference. First operand has 137 places, 185 transitions, 2134 flow. Second operand 26 states and 269 transitions. [2024-11-27 23:22:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 369 transitions, 4873 flow [2024-11-27 23:22:47,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 369 transitions, 4740 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-11-27 23:22:47,365 INFO L231 Difference]: Finished difference. Result has 168 places, 295 transitions, 4164 flow [2024-11-27 23:22:47,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4164, PETRI_PLACES=168, PETRI_TRANSITIONS=295} [2024-11-27 23:22:47,366 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 144 predicate places. [2024-11-27 23:22:47,366 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 295 transitions, 4164 flow [2024-11-27 23:22:47,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:47,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:47,366 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:47,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:22:47,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:47,567 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:47,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -829002040, now seen corresponding path program 5 times [2024-11-27 23:22:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228607113] [2024-11-27 23:22:47,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:22:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:47,580 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:47,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:47,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:47,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228607113] [2024-11-27 23:22:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228607113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:47,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248590564] [2024-11-27 23:22:47,761 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:22:47,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:47,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:47,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:47,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:22:47,817 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:47,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:47,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:47,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:47,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248590564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:48,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:48,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-27 23:22:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086240384] [2024-11-27 23:22:48,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:48,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:22:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:48,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:22:48,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:22:48,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:48,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 295 transitions, 4164 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:48,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:49,670 INFO L124 PetriNetUnfolderBase]: 1476/2714 cut-off events. [2024-11-27 23:22:49,670 INFO L125 PetriNetUnfolderBase]: For 56617/56631 co-relation queries the response was YES. [2024-11-27 23:22:49,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18528 conditions, 2714 events. 1476/2714 cut-off events. For 56617/56631 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16453 event pairs, 62 based on Foata normal form. 53/2745 useless extension candidates. Maximal degree in co-relation 18283. Up to 611 conditions per place. [2024-11-27 23:22:49,714 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 134 selfloop transitions, 327 changer transitions 0/468 dead transitions. [2024-11-27 23:22:49,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 468 transitions, 7524 flow [2024-11-27 23:22:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 23:22:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-27 23:22:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 343 transitions. [2024-11-27 23:22:49,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4724517906336088 [2024-11-27 23:22:49,716 INFO L175 Difference]: Start difference. First operand has 168 places, 295 transitions, 4164 flow. Second operand 33 states and 343 transitions. [2024-11-27 23:22:49,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 468 transitions, 7524 flow [2024-11-27 23:22:49,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 468 transitions, 7135 flow, removed 156 selfloop flow, removed 8 redundant places. [2024-11-27 23:22:49,912 INFO L231 Difference]: Finished difference. Result has 207 places, 394 transitions, 6595 flow [2024-11-27 23:22:49,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6595, PETRI_PLACES=207, PETRI_TRANSITIONS=394} [2024-11-27 23:22:49,913 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 183 predicate places. [2024-11-27 23:22:49,913 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 394 transitions, 6595 flow [2024-11-27 23:22:49,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:49,914 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:49,914 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:49,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:22:50,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:50,114 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:50,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -585430492, now seen corresponding path program 6 times [2024-11-27 23:22:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282221950] [2024-11-27 23:22:50,115 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:22:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:50,126 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:22:50,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:50,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282221950] [2024-11-27 23:22:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282221950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362122471] [2024-11-27 23:22:50,262 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:22:50,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:50,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:50,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:50,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:22:50,317 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:22:50,318 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:50,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:50,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:50,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362122471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:50,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:50,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-27 23:22:50,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202922337] [2024-11-27 23:22:50,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:50,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:22:50,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:50,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:22:50,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:22:50,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:50,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 394 transitions, 6595 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 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) [2024-11-27 23:22:50,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:50,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:52,498 INFO L124 PetriNetUnfolderBase]: 1905/3481 cut-off events. [2024-11-27 23:22:52,498 INFO L125 PetriNetUnfolderBase]: For 95578/95598 co-relation queries the response was YES. [2024-11-27 23:22:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26887 conditions, 3481 events. 1905/3481 cut-off events. For 95578/95598 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22024 event pairs, 51 based on Foata normal form. 50/3505 useless extension candidates. Maximal degree in co-relation 26600. Up to 708 conditions per place. [2024-11-27 23:22:52,538 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 166 selfloop transitions, 434 changer transitions 3/610 dead transitions. [2024-11-27 23:22:52,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 610 transitions, 11357 flow [2024-11-27 23:22:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-27 23:22:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-27 23:22:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 419 transitions. [2024-11-27 23:22:52,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4429175475687104 [2024-11-27 23:22:52,549 INFO L175 Difference]: Start difference. First operand has 207 places, 394 transitions, 6595 flow. Second operand 43 states and 419 transitions. [2024-11-27 23:22:52,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 610 transitions, 11357 flow [2024-11-27 23:22:53,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 610 transitions, 10953 flow, removed 162 selfloop flow, removed 5 redundant places. [2024-11-27 23:22:53,111 INFO L231 Difference]: Finished difference. Result has 258 places, 499 transitions, 9487 flow [2024-11-27 23:22:53,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=9487, PETRI_PLACES=258, PETRI_TRANSITIONS=499} [2024-11-27 23:22:53,111 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 234 predicate places. [2024-11-27 23:22:53,111 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 499 transitions, 9487 flow [2024-11-27 23:22:53,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 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) [2024-11-27 23:22:53,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:53,112 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:53,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:22:53,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:22:53,316 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1740043322, now seen corresponding path program 7 times [2024-11-27 23:22:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009594792] [2024-11-27 23:22:53,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:22:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009594792] [2024-11-27 23:22:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009594792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569223638] [2024-11-27 23:22:53,457 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:22:53,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:53,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:53,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:22:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:53,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:53,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:53,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569223638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:53,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:53,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-27 23:22:53,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437959295] [2024-11-27 23:22:53,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:53,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:22:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:53,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:22:53,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:22:53,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:53,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 499 transitions, 9487 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:53,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:53,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:53,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:55,077 INFO L124 PetriNetUnfolderBase]: 2108/3853 cut-off events. [2024-11-27 23:22:55,078 INFO L125 PetriNetUnfolderBase]: For 112995/113009 co-relation queries the response was YES. [2024-11-27 23:22:55,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32640 conditions, 3853 events. 2108/3853 cut-off events. For 112995/113009 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 24314 event pairs, 131 based on Foata normal form. 22/3847 useless extension candidates. Maximal degree in co-relation 32292. Up to 808 conditions per place. [2024-11-27 23:22:55,112 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 210 selfloop transitions, 385 changer transitions 3/605 dead transitions. [2024-11-27 23:22:55,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 605 transitions, 12702 flow [2024-11-27 23:22:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 23:22:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-27 23:22:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 248 transitions. [2024-11-27 23:22:55,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4901185770750988 [2024-11-27 23:22:55,117 INFO L175 Difference]: Start difference. First operand has 258 places, 499 transitions, 9487 flow. Second operand 23 states and 248 transitions. [2024-11-27 23:22:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 605 transitions, 12702 flow [2024-11-27 23:22:56,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 605 transitions, 11860 flow, removed 168 selfloop flow, removed 15 redundant places. [2024-11-27 23:22:56,048 INFO L231 Difference]: Finished difference. Result has 267 places, 539 transitions, 10242 flow [2024-11-27 23:22:56,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8722, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10242, PETRI_PLACES=267, PETRI_TRANSITIONS=539} [2024-11-27 23:22:56,048 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 243 predicate places. [2024-11-27 23:22:56,049 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 539 transitions, 10242 flow [2024-11-27 23:22:56,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:56,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:56,049 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:56,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:22:56,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:22:56,249 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:22:56,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -969030824, now seen corresponding path program 8 times [2024-11-27 23:22:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:56,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799302199] [2024-11-27 23:22:56,250 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:22:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:56,272 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:56,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:56,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799302199] [2024-11-27 23:22:56,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799302199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167642420] [2024-11-27 23:22:56,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:22:56,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:56,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:56,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:22:56,573 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:56,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:56,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:22:56,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:56,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:56,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167642420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:56,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:56,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-11-27 23:22:56,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196166751] [2024-11-27 23:22:56,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:56,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:22:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:56,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:22:56,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:22:56,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:22:56,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 539 transitions, 10242 flow. Second operand has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:56,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:56,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:22:56,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:59,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:23:00,704 INFO L124 PetriNetUnfolderBase]: 2644/4855 cut-off events. [2024-11-27 23:23:00,705 INFO L125 PetriNetUnfolderBase]: For 144236/144254 co-relation queries the response was YES. [2024-11-27 23:23:00,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41439 conditions, 4855 events. 2644/4855 cut-off events. For 144236/144254 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 32102 event pairs, 203 based on Foata normal form. 30/4855 useless extension candidates. Maximal degree in co-relation 41309. Up to 1027 conditions per place. [2024-11-27 23:23:00,745 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 220 selfloop transitions, 562 changer transitions 3/792 dead transitions. [2024-11-27 23:23:00,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 792 transitions, 16694 flow [2024-11-27 23:23:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 23:23:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-27 23:23:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 317 transitions. [2024-11-27 23:23:00,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4502840909090909 [2024-11-27 23:23:00,747 INFO L175 Difference]: Start difference. First operand has 267 places, 539 transitions, 10242 flow. Second operand 32 states and 317 transitions. [2024-11-27 23:23:00,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 792 transitions, 16694 flow [2024-11-27 23:23:01,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 792 transitions, 16194 flow, removed 22 selfloop flow, removed 17 redundant places. [2024-11-27 23:23:01,818 INFO L231 Difference]: Finished difference. Result has 292 places, 708 transitions, 15461 flow [2024-11-27 23:23:01,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9872, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15461, PETRI_PLACES=292, PETRI_TRANSITIONS=708} [2024-11-27 23:23:01,818 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 268 predicate places. [2024-11-27 23:23:01,819 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 708 transitions, 15461 flow [2024-11-27 23:23:01,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:01,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:01,819 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:01,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:02,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:23:02,019 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:02,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2102910130, now seen corresponding path program 9 times [2024-11-27 23:23:02,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:02,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598583671] [2024-11-27 23:23:02,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:02,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:02,030 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:23:02,030 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598583671] [2024-11-27 23:23:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598583671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572416754] [2024-11-27 23:23:02,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:02,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:02,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:02,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:23:02,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:23:02,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:02,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:02,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:02,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:02,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572416754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:02,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:02,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-11-27 23:23:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332386083] [2024-11-27 23:23:02,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:02,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:23:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:02,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:23:02,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:23:02,581 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:02,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 708 transitions, 15461 flow. Second operand has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:02,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:02,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:02,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:05,660 INFO L124 PetriNetUnfolderBase]: 3030/5532 cut-off events. [2024-11-27 23:23:05,660 INFO L125 PetriNetUnfolderBase]: For 209279/209297 co-relation queries the response was YES. [2024-11-27 23:23:05,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52048 conditions, 5532 events. 3030/5532 cut-off events. For 209279/209297 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 37162 event pairs, 233 based on Foata normal form. 32/5524 useless extension candidates. Maximal degree in co-relation 50677. Up to 1179 conditions per place. [2024-11-27 23:23:05,702 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 199 selfloop transitions, 682 changer transitions 5/893 dead transitions. [2024-11-27 23:23:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 893 transitions, 21252 flow [2024-11-27 23:23:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 23:23:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 23:23:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 274 transitions. [2024-11-27 23:23:05,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2024-11-27 23:23:05,704 INFO L175 Difference]: Start difference. First operand has 292 places, 708 transitions, 15461 flow. Second operand 27 states and 274 transitions. [2024-11-27 23:23:05,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 893 transitions, 21252 flow [2024-11-27 23:23:07,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 893 transitions, 20751 flow, removed 207 selfloop flow, removed 10 redundant places. [2024-11-27 23:23:07,337 INFO L231 Difference]: Finished difference. Result has 318 places, 841 transitions, 21025 flow [2024-11-27 23:23:07,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14983, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21025, PETRI_PLACES=318, PETRI_TRANSITIONS=841} [2024-11-27 23:23:07,337 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 294 predicate places. [2024-11-27 23:23:07,337 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 841 transitions, 21025 flow [2024-11-27 23:23:07,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:07,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:07,338 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:07,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:23:07,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:23:07,538 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:07,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:07,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1966560418, now seen corresponding path program 10 times [2024-11-27 23:23:07,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:07,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934102750] [2024-11-27 23:23:07,539 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:23:07,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:07,552 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:23:07,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:07,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934102750] [2024-11-27 23:23:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934102750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:07,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014387009] [2024-11-27 23:23:07,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:23:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:07,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:07,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:07,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:23:07,771 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:23:07,771 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:07,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:07,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:07,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:08,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014387009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:08,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:08,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-27 23:23:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435281080] [2024-11-27 23:23:08,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:08,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:23:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:08,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:23:08,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:23:08,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:08,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 841 transitions, 21025 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:08,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:08,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:14,431 INFO L124 PetriNetUnfolderBase]: 3255/5959 cut-off events. [2024-11-27 23:23:14,431 INFO L125 PetriNetUnfolderBase]: For 255723/255747 co-relation queries the response was YES. [2024-11-27 23:23:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61535 conditions, 5959 events. 3255/5959 cut-off events. For 255723/255747 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 40697 event pairs, 415 based on Foata normal form. 10/5931 useless extension candidates. Maximal degree in co-relation 60129. Up to 2162 conditions per place. [2024-11-27 23:23:14,485 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 379 selfloop transitions, 551 changer transitions 3/940 dead transitions. [2024-11-27 23:23:14,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 940 transitions, 25198 flow [2024-11-27 23:23:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:23:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:23:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 218 transitions. [2024-11-27 23:23:14,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-11-27 23:23:14,486 INFO L175 Difference]: Start difference. First operand has 318 places, 841 transitions, 21025 flow. Second operand 22 states and 218 transitions. [2024-11-27 23:23:14,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 940 transitions, 25198 flow [2024-11-27 23:23:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 940 transitions, 23922 flow, removed 398 selfloop flow, removed 14 redundant places. [2024-11-27 23:23:17,186 INFO L231 Difference]: Finished difference. Result has 324 places, 890 transitions, 22363 flow [2024-11-27 23:23:17,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=19939, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22363, PETRI_PLACES=324, PETRI_TRANSITIONS=890} [2024-11-27 23:23:17,187 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 300 predicate places. [2024-11-27 23:23:17,187 INFO L471 AbstractCegarLoop]: Abstraction has has 324 places, 890 transitions, 22363 flow [2024-11-27 23:23:17,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:17,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:17,188 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:17,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:23:17,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:23:17,388 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:17,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1820493154, now seen corresponding path program 11 times [2024-11-27 23:23:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:17,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631332697] [2024-11-27 23:23:17,389 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:23:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:17,399 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:17,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:17,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:17,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631332697] [2024-11-27 23:23:17,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631332697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:17,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602232283] [2024-11-27 23:23:17,563 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:23:17,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:17,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:23:17,626 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:17,626 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:17,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:17,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:17,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:18,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602232283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:18,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:18,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-27 23:23:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242209912] [2024-11-27 23:23:18,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:18,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:23:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:18,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:23:18,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:23:22,488 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 [1] [2024-11-27 23:23:22,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:22,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 890 transitions, 22363 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:22,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:22,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:24,708 INFO L124 PetriNetUnfolderBase]: 3317/6092 cut-off events. [2024-11-27 23:23:24,708 INFO L125 PetriNetUnfolderBase]: For 241023/241053 co-relation queries the response was YES. [2024-11-27 23:23:24,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62168 conditions, 6092 events. 3317/6092 cut-off events. For 241023/241053 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 41742 event pairs, 853 based on Foata normal form. 12/6061 useless extension candidates. Maximal degree in co-relation 61750. Up to 4225 conditions per place. [2024-11-27 23:23:24,774 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 786 selfloop transitions, 154 changer transitions 4/951 dead transitions. [2024-11-27 23:23:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 951 transitions, 25637 flow [2024-11-27 23:23:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:23:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 23:23:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 136 transitions. [2024-11-27 23:23:24,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-11-27 23:23:24,776 INFO L175 Difference]: Start difference. First operand has 324 places, 890 transitions, 22363 flow. Second operand 14 states and 136 transitions. [2024-11-27 23:23:24,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 951 transitions, 25637 flow [2024-11-27 23:23:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 951 transitions, 25445 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-11-27 23:23:27,982 INFO L231 Difference]: Finished difference. Result has 333 places, 916 transitions, 23468 flow [2024-11-27 23:23:27,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=22181, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23468, PETRI_PLACES=333, PETRI_TRANSITIONS=916} [2024-11-27 23:23:27,983 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 309 predicate places. [2024-11-27 23:23:27,983 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 916 transitions, 23468 flow [2024-11-27 23:23:27,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:27,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:27,984 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:27,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:23:28,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:23:28,184 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:28,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash 756799946, now seen corresponding path program 12 times [2024-11-27 23:23:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:28,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648736536] [2024-11-27 23:23:28,185 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:23:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:28,205 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-27 23:23:28,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648736536] [2024-11-27 23:23:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648736536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99615834] [2024-11-27 23:23:28,386 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:23:28,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:28,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:28,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:23:28,445 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-27 23:23:28,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:28,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:28,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:28,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99615834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:28,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:28,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-27 23:23:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288665018] [2024-11-27 23:23:28,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:28,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:23:28,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:28,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:23:28,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:23:28,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:28,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 916 transitions, 23468 flow. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:28,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:28,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:28,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:34,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:23:40,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:23:41,518 INFO L124 PetriNetUnfolderBase]: 4347/7921 cut-off events. [2024-11-27 23:23:41,518 INFO L125 PetriNetUnfolderBase]: For 396891/396933 co-relation queries the response was YES. [2024-11-27 23:23:41,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82452 conditions, 7921 events. 4347/7921 cut-off events. For 396891/396933 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 56452 event pairs, 506 based on Foata normal form. 96/7964 useless extension candidates. Maximal degree in co-relation 81721. Up to 2342 conditions per place. [2024-11-27 23:23:41,646 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 711 selfloop transitions, 638 changer transitions 2/1358 dead transitions. [2024-11-27 23:23:41,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1358 transitions, 37115 flow [2024-11-27 23:23:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-27 23:23:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-27 23:23:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 431 transitions. [2024-11-27 23:23:41,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46645021645021645 [2024-11-27 23:23:41,648 INFO L175 Difference]: Start difference. First operand has 333 places, 916 transitions, 23468 flow. Second operand 42 states and 431 transitions. [2024-11-27 23:23:41,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1358 transitions, 37115 flow [2024-11-27 23:23:46,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1358 transitions, 36724 flow, removed 160 selfloop flow, removed 4 redundant places. [2024-11-27 23:23:46,303 INFO L231 Difference]: Finished difference. Result has 388 places, 1169 transitions, 32671 flow [2024-11-27 23:23:46,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=23150, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=32671, PETRI_PLACES=388, PETRI_TRANSITIONS=1169} [2024-11-27 23:23:46,304 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 364 predicate places. [2024-11-27 23:23:46,304 INFO L471 AbstractCegarLoop]: Abstraction has has 388 places, 1169 transitions, 32671 flow [2024-11-27 23:23:46,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:46,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:46,305 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:46,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:23:46,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:46,505 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:46,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1407640142, now seen corresponding path program 13 times [2024-11-27 23:23:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82948610] [2024-11-27 23:23:46,506 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:23:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82948610] [2024-11-27 23:23:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82948610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951789632] [2024-11-27 23:23:46,629 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:23:46,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:46,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:46,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:23:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:46,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:46,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:46,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951789632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:46,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-27 23:23:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587095856] [2024-11-27 23:23:46,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:46,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:23:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:46,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:23:46,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:23:46,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:46,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1169 transitions, 32671 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:46,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:46,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:46,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:51,706 INFO L124 PetriNetUnfolderBase]: 5385/9817 cut-off events. [2024-11-27 23:23:51,706 INFO L125 PetriNetUnfolderBase]: For 462426/462472 co-relation queries the response was YES. [2024-11-27 23:23:51,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109122 conditions, 9817 events. 5385/9817 cut-off events. For 462426/462472 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 72544 event pairs, 965 based on Foata normal form. 14/9762 useless extension candidates. Maximal degree in co-relation 108371. Up to 5117 conditions per place. [2024-11-27 23:23:51,829 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 825 selfloop transitions, 688 changer transitions 0/1520 dead transitions. [2024-11-27 23:23:51,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1520 transitions, 45683 flow [2024-11-27 23:23:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:23:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-27 23:23:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 210 transitions. [2024-11-27 23:23:51,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-27 23:23:51,830 INFO L175 Difference]: Start difference. First operand has 388 places, 1169 transitions, 32671 flow. Second operand 20 states and 210 transitions. [2024-11-27 23:23:51,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1520 transitions, 45683 flow [2024-11-27 23:23:58,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1520 transitions, 44762 flow, removed 402 selfloop flow, removed 5 redundant places. [2024-11-27 23:23:58,754 INFO L231 Difference]: Finished difference. Result has 410 places, 1451 transitions, 42563 flow [2024-11-27 23:23:58,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=31924, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=42563, PETRI_PLACES=410, PETRI_TRANSITIONS=1451} [2024-11-27 23:23:58,755 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 386 predicate places. [2024-11-27 23:23:58,755 INFO L471 AbstractCegarLoop]: Abstraction has has 410 places, 1451 transitions, 42563 flow [2024-11-27 23:23:58,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:58,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:58,756 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:58,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:58,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:58,956 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:23:58,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash -560712668, now seen corresponding path program 14 times [2024-11-27 23:23:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:58,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919693176] [2024-11-27 23:23:58,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:58,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:58,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:59,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:59,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919693176] [2024-11-27 23:23:59,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919693176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:59,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991371753] [2024-11-27 23:23:59,189 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:59,191 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:59,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:23:59,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:59,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:59,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:23:59,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:59,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991371753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:59,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:59,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-11-27 23:23:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683134446] [2024-11-27 23:23:59,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:59,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:23:59,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:59,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:23:59,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:23:59,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:23:59,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1451 transitions, 42563 flow. Second operand has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:59,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:59,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:23:59,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:24:12,090 INFO L124 PetriNetUnfolderBase]: 5991/10884 cut-off events. [2024-11-27 23:24:12,090 INFO L125 PetriNetUnfolderBase]: For 563720/563776 co-relation queries the response was YES. [2024-11-27 23:24:12,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126209 conditions, 10884 events. 5991/10884 cut-off events. For 563720/563776 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 81561 event pairs, 666 based on Foata normal form. 41/10836 useless extension candidates. Maximal degree in co-relation 125398. Up to 3417 conditions per place. [2024-11-27 23:24:12,245 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 675 selfloop transitions, 962 changer transitions 5/1649 dead transitions. [2024-11-27 23:24:12,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1649 transitions, 51238 flow [2024-11-27 23:24:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:24:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:24:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 225 transitions. [2024-11-27 23:24:12,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-11-27 23:24:12,246 INFO L175 Difference]: Start difference. First operand has 410 places, 1451 transitions, 42563 flow. Second operand 22 states and 225 transitions. [2024-11-27 23:24:12,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1649 transitions, 51238 flow [2024-11-27 23:24:20,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1649 transitions, 50251 flow, removed 388 selfloop flow, removed 6 redundant places. [2024-11-27 23:24:20,773 INFO L231 Difference]: Finished difference. Result has 433 places, 1607 transitions, 49795 flow [2024-11-27 23:24:20,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=41503, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=49795, PETRI_PLACES=433, PETRI_TRANSITIONS=1607} [2024-11-27 23:24:20,775 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 409 predicate places. [2024-11-27 23:24:20,775 INFO L471 AbstractCegarLoop]: Abstraction has has 433 places, 1607 transitions, 49795 flow [2024-11-27 23:24:20,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:20,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:24:20,775 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:20,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 23:24:20,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:20,980 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:24:20,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1322297268, now seen corresponding path program 15 times [2024-11-27 23:24:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285024229] [2024-11-27 23:24:20,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:20,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:20,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:24:20,990 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285024229] [2024-11-27 23:24:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285024229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000554807] [2024-11-27 23:24:21,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:24:21,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:21,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:24:21,182 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:24:21,182 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:21,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:24:21,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:21,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000554807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:21,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-27 23:24:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270371916] [2024-11-27 23:24:21,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:21,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:24:21,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:21,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:24:21,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:24:21,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-11-27 23:24:21,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1607 transitions, 49795 flow. Second operand has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:21,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:24:21,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-11-27 23:24:21,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:24:28,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:24:32,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 23:24:38,063 INFO L124 PetriNetUnfolderBase]: 6831/12429 cut-off events. [2024-11-27 23:24:38,064 INFO L125 PetriNetUnfolderBase]: For 727984/728048 co-relation queries the response was YES. [2024-11-27 23:24:38,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151895 conditions, 12429 events. 6831/12429 cut-off events. For 727984/728048 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 94557 event pairs, 669 based on Foata normal form. 61/12399 useless extension candidates. Maximal degree in co-relation 150835. Up to 3428 conditions per place. [2024-11-27 23:24:38,233 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 637 selfloop transitions, 1252 changer transitions 4/1900 dead transitions. [2024-11-27 23:24:38,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1900 transitions, 62505 flow [2024-11-27 23:24:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 23:24:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-27 23:24:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 342 transitions. [2024-11-27 23:24:38,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-11-27 23:24:38,234 INFO L175 Difference]: Start difference. First operand has 433 places, 1607 transitions, 49795 flow. Second operand 33 states and 342 transitions. [2024-11-27 23:24:38,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1900 transitions, 62505 flow [2024-11-27 23:24:50,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1900 transitions, 61574 flow, removed 287 selfloop flow, removed 12 redundant places. [2024-11-27 23:24:50,188 INFO L231 Difference]: Finished difference. Result has 459 places, 1841 transitions, 60540 flow [2024-11-27 23:24:50,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=48947, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=60540, PETRI_PLACES=459, PETRI_TRANSITIONS=1841} [2024-11-27 23:24:50,190 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 435 predicate places. [2024-11-27 23:24:50,190 INFO L471 AbstractCegarLoop]: Abstraction has has 459 places, 1841 transitions, 60540 flow [2024-11-27 23:24:50,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:50,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:24:50,190 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:24:50,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 23:24:50,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-27 23:24:50,391 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:24:50,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash 823552433, now seen corresponding path program 16 times [2024-11-27 23:24:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083529363] [2024-11-27 23:24:50,391 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:50,401 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:50,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083529363] [2024-11-27 23:24:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083529363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41959187] [2024-11-27 23:24:50,518 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:50,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:50,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:50,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:50,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b6242b1-1cf4-4cc0-b74f-56c58c1d0085/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:24:50,581 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:50,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:50,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:24:50,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:50,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:24:50,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41959187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:50,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:50,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-11-27 23:24:50,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864434800] [2024-11-27 23:24:50,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:50,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:24:50,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:50,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:24:50,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:24:50,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-27 23:24:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1841 transitions, 60540 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:24:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-27 23:24:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:25:06,750 INFO L124 PetriNetUnfolderBase]: 15295/25502 cut-off events. [2024-11-27 23:25:06,750 INFO L125 PetriNetUnfolderBase]: For 1518288/1518625 co-relation queries the response was YES. [2024-11-27 23:25:07,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299026 conditions, 25502 events. 15295/25502 cut-off events. For 1518288/1518625 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 192509 event pairs, 954 based on Foata normal form. 426/25909 useless extension candidates. Maximal degree in co-relation 298130. Up to 8428 conditions per place. [2024-11-27 23:25:07,491 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 3135 selfloop transitions, 10 changer transitions 260/3735 dead transitions. [2024-11-27 23:25:07,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 3735 transitions, 131353 flow [2024-11-27 23:25:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:25:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:25:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-27 23:25:07,492 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-11-27 23:25:07,492 INFO L175 Difference]: Start difference. First operand has 459 places, 1841 transitions, 60540 flow. Second operand 5 states and 78 transitions. [2024-11-27 23:25:07,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 3735 transitions, 131353 flow