./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd --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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:43:11,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:43:11,186 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 13:43:11,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:43:11,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:43:11,232 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:43:11,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:43:11,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:43:11,235 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:43:11,235 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:43:11,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:43:11,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:43:11,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:43:11,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:43:11,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:43:11,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:43:11,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:43:11,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:43:11,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:43:11,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:43:11,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:43:11,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:43:11,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:43:11,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:43:11,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:43:11,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:43:11,244 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_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd 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 -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-13 13:43:11,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:43:11,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:43:11,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:43:11,629 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:43:11,630 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:43:11,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/clever.wvr.c Unable to find full path for "g++" [2024-11-13 13:43:13,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:43:13,958 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:43:13,959 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-13 13:43:13,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/data/affc5fe5f/81b490776a8a47e1b06c69c95e0c584c/FLAG8d1a65020 [2024-11-13 13:43:13,986 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/data/affc5fe5f/81b490776a8a47e1b06c69c95e0c584c [2024-11-13 13:43:13,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:43:13,991 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:43:13,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:43:13,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:43:13,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:43:13,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:43:13" (1/1) ... [2024-11-13 13:43:14,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d6ff05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14, skipping insertion in model container [2024-11-13 13:43:14,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:43:13" (1/1) ... [2024-11-13 13:43:14,020 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:43:14,203 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_d73a0424-b913-4388-ac85-e14fc8f6ecf4/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-13 13:43:14,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:43:14,217 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:43:14,236 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_d73a0424-b913-4388-ac85-e14fc8f6ecf4/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-13 13:43:14,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:43:14,260 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:43:14,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14 WrapperNode [2024-11-13 13:43:14,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:43:14,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:43:14,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:43:14,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:43:14,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,304 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-13 13:43:14,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:43:14,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:43:14,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:43:14,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:43:14,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,339 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]. [2024-11-13 13:43:14,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:43:14,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:43:14,363 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:43:14,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:43:14,364 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (1/1) ... [2024-11-13 13:43:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:43:14,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:14,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:43:14,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:43:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:43:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:43:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:43:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:43:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:43:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:43:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:43:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:43:14,452 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:43:14,563 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:43:14,565 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:43:14,787 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:43:14,787 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:43:15,038 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:43:15,038 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 13:43:15,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:43:15 BoogieIcfgContainer [2024-11-13 13:43:15,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:43:15,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:43:15,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:43:15,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:43:15,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:43:13" (1/3) ... [2024-11-13 13:43:15,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d732d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:43:15, skipping insertion in model container [2024-11-13 13:43:15,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:43:14" (2/3) ... [2024-11-13 13:43:15,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d732d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:43:15, skipping insertion in model container [2024-11-13 13:43:15,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:43:15" (3/3) ... [2024-11-13 13:43:15,051 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-13 13:43:15,070 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:43:15,072 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG clever.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 13:43:15,073 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:43:15,145 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 13:43:15,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 13:43:15,242 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-13 13:43:15,245 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:43:15,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-11-13 13:43:15,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 13:43:15,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-13 13:43:15,261 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:43:15,275 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;@5a8c81ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:43:15,276 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 13:43:15,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:43:15,287 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-13 13:43:15,287 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:43:15,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:15,288 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:15,288 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:15,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash 492582307, now seen corresponding path program 1 times [2024-11-13 13:43:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:15,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330205418] [2024-11-13 13:43:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330205418] [2024-11-13 13:43:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330205418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:15,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:43:15,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105685533] [2024-11-13 13:43:15,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:15,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:43:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:43:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:43:16,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:16,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-11-13 13:43:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:16,159 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-11-13 13:43:16,159 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-13 13:43:16,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-11-13 13:43:16,165 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-13 13:43:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-11-13 13:43:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:43:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:43:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-13 13:43:16,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-13 13:43:16,188 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-11-13 13:43:16,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-11-13 13:43:16,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:43:16,198 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-13 13:43:16,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-13 13:43:16,206 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-13 13:43:16,207 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-13 13:43:16,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-11-13 13:43:16,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:16,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:43:16,208 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1910895681, now seen corresponding path program 1 times [2024-11-13 13:43:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42848612] [2024-11-13 13:43:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42848612] [2024-11-13 13:43:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42848612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:16,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:16,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:43:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242353717] [2024-11-13 13:43:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:16,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:43:16,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:43:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:43:16,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:16,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-13 13:43:16,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:16,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:16,565 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-11-13 13:43:16,565 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-11-13 13:43:16,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-11-13 13:43:16,571 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-11-13 13:43:16,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-11-13 13:43:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-13 13:43:16,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-13 13:43:16,576 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-11-13 13:43:16,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-11-13 13:43:16,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:16,581 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-11-13 13:43:16,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-13 13:43:16,582 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-13 13:43:16,582 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-11-13 13:43:16,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-13 13:43:16,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:16,584 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:16,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:43:16,585 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:16,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 676714043, now seen corresponding path program 2 times [2024-11-13 13:43:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918594342] [2024-11-13 13:43:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:16,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918594342] [2024-11-13 13:43:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918594342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:16,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:43:16,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197474935] [2024-11-13 13:43:16,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:16,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:43:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:43:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:43:16,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:16,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-13 13:43:16,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:16,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:16,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:16,961 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-11-13 13:43:16,964 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-11-13 13:43:16,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-11-13 13:43:16,969 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-11-13 13:43:16,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-11-13 13:43:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-13 13:43:16,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-13 13:43:16,973 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-11-13 13:43:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-11-13 13:43:16,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 13:43:16,980 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-11-13 13:43:16,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-11-13 13:43:16,981 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-11-13 13:43:16,981 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-11-13 13:43:16,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-13 13:43:16,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:16,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:16,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:43:16,983 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:16,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash 659958189, now seen corresponding path program 1 times [2024-11-13 13:43:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:16,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642737879] [2024-11-13 13:43:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642737879] [2024-11-13 13:43:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642737879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811673685] [2024-11-13 13:43:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:17,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:43:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:17,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:43:17,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:17,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811673685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-13 13:43:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689615373] [2024-11-13 13:43:17,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:17,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:43:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:43:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:43:17,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:17,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-13 13:43:17,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:17,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:17,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:17,637 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-11-13 13:43:17,637 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-11-13 13:43:17,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-11-13 13:43:17,644 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-11-13 13:43:17,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-11-13 13:43:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-13 13:43:17,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-13 13:43:17,647 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-11-13 13:43:17,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-11-13 13:43:17,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-13 13:43:17,656 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-11-13 13:43:17,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-13 13:43:17,659 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-11-13 13:43:17,659 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-11-13 13:43:17,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-11-13 13:43:17,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:17,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:17,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:43:17,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:17,861 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:17,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1935730788, now seen corresponding path program 1 times [2024-11-13 13:43:17,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:17,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946217659] [2024-11-13 13:43:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:18,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946217659] [2024-11-13 13:43:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946217659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:18,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384131509] [2024-11-13 13:43:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:18,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:18,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:43:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:18,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:43:18,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:18,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:18,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384131509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:18,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:18,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-13 13:43:18,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332101929] [2024-11-13 13:43:18,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:18,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:18,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:18,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:18,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 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) [2024-11-13 13:43:18,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:18,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:18,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:19,386 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-13 13:43:19,386 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-11-13 13:43:19,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 435 events. 249/435 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1668 event pairs, 10 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 176 conditions per place. [2024-11-13 13:43:19,391 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2024-11-13 13:43:19,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 105 transitions, 891 flow [2024-11-13 13:43:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:43:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:43:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-11-13 13:43:19,393 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-13 13:43:19,393 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-11-13 13:43:19,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 105 transitions, 891 flow [2024-11-13 13:43:19,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 881 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:19,402 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 428 flow [2024-11-13 13:43:19,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-13 13:43:19,403 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-13 13:43:19,403 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 428 flow [2024-11-13 13:43:19,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 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) [2024-11-13 13:43:19,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:19,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:19,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:19,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:19,607 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:19,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash -518826483, now seen corresponding path program 2 times [2024-11-13 13:43:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:19,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738369561] [2024-11-13 13:43:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:19,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738369561] [2024-11-13 13:43:19,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738369561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:43:19,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:43:19,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:43:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758179066] [2024-11-13 13:43:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:43:19,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:43:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:43:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:43:19,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:19,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-13 13:43:19,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:19,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:19,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:19,852 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2024-11-13 13:43:19,852 INFO L125 PetriNetUnfolderBase]: For 1058/1064 co-relation queries the response was YES. [2024-11-13 13:43:19,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 331 events. 192/331 cut-off events. For 1058/1064 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1120 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1517. Up to 152 conditions per place. [2024-11-13 13:43:19,856 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2024-11-13 13:43:19,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 703 flow [2024-11-13 13:43:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:43:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:43:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-13 13:43:19,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-13 13:43:19,858 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 428 flow. Second operand 5 states and 59 transitions. [2024-11-13 13:43:19,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 703 flow [2024-11-13 13:43:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 646 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-13 13:43:19,867 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 464 flow [2024-11-13 13:43:19,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-13 13:43:19,868 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-13 13:43:19,868 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 464 flow [2024-11-13 13:43:19,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-13 13:43:19,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:19,869 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:19,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 13:43:19,869 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:19,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 175982448, now seen corresponding path program 2 times [2024-11-13 13:43:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454927402] [2024-11-13 13:43:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:19,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:20,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454927402] [2024-11-13 13:43:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454927402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723876668] [2024-11-13 13:43:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:43:20,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:20,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:20,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:20,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:43:20,398 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:43:20,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:20,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:43:20,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:20,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:20,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723876668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:20,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:20,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-13 13:43:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812253783] [2024-11-13 13:43:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:20,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:20,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:20,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-11-13 13:43:20,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:20,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:20,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:21,917 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2024-11-13 13:43:21,917 INFO L125 PetriNetUnfolderBase]: For 4195/4195 co-relation queries the response was YES. [2024-11-13 13:43:21,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 1068 events. 624/1068 cut-off events. For 4195/4195 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5018 event pairs, 41 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4302. Up to 300 conditions per place. [2024-11-13 13:43:21,927 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2024-11-13 13:43:21,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2364 flow [2024-11-13 13:43:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 13:43:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 13:43:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-11-13 13:43:21,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2024-11-13 13:43:21,930 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 464 flow. Second operand 17 states and 223 transitions. [2024-11-13 13:43:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2364 flow [2024-11-13 13:43:21,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2261 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-13 13:43:21,951 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1563 flow [2024-11-13 13:43:21,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1563, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2024-11-13 13:43:21,952 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-11-13 13:43:21,952 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1563 flow [2024-11-13 13:43:21,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-11-13 13:43:21,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:21,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:21,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:22,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:22,154 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:22,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:22,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1340628016, now seen corresponding path program 3 times [2024-11-13 13:43:22,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:22,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143236430] [2024-11-13 13:43:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:22,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:22,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143236430] [2024-11-13 13:43:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143236430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:22,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044309669] [2024-11-13 13:43:22,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:43:22,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:22,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:22,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:22,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:43:22,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:43:22,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:22,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:43:22,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:22,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044309669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:23,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:23,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-13 13:43:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329208349] [2024-11-13 13:43:23,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:23,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:43:23,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:43:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:43:23,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:23,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1563 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-11-13 13:43:23,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:23,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:23,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:23,990 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2024-11-13 13:43:23,990 INFO L125 PetriNetUnfolderBase]: For 11594/11594 co-relation queries the response was YES. [2024-11-13 13:43:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12439 conditions, 2300 events. 1342/2300 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12744 event pairs, 114 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11785. Up to 611 conditions per place. [2024-11-13 13:43:24,016 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2024-11-13 13:43:24,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4461 flow [2024-11-13 13:43:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:43:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:43:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-11-13 13:43:24,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-11-13 13:43:24,018 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1563 flow. Second operand 11 states and 144 transitions. [2024-11-13 13:43:24,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4461 flow [2024-11-13 13:43:24,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4153 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:24,069 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3257 flow [2024-11-13 13:43:24,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3257, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2024-11-13 13:43:24,070 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-13 13:43:24,070 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3257 flow [2024-11-13 13:43:24,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-11-13 13:43:24,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:24,071 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:24,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:24,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:24,275 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:24,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1966256139, now seen corresponding path program 1 times [2024-11-13 13:43:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:24,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315874534] [2024-11-13 13:43:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:24,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315874534] [2024-11-13 13:43:24,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315874534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822609408] [2024-11-13 13:43:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:24,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:24,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:24,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:24,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:43:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:24,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:43:24,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:24,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822609408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:24,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 13:43:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072180871] [2024-11-13 13:43:24,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:24,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:43:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:43:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:43:24,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:24,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3257 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-13 13:43:24,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:24,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:24,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:25,625 INFO L124 PetriNetUnfolderBase]: 2084/3651 cut-off events. [2024-11-13 13:43:25,625 INFO L125 PetriNetUnfolderBase]: For 24655/24661 co-relation queries the response was YES. [2024-11-13 13:43:25,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21377 conditions, 3651 events. 2084/3651 cut-off events. For 24655/24661 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23277 event pairs, 25 based on Foata normal form. 49/3698 useless extension candidates. Maximal degree in co-relation 20652. Up to 988 conditions per place. [2024-11-13 13:43:25,734 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 382 selfloop transitions, 144 changer transitions 2/531 dead transitions. [2024-11-13 13:43:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 531 transitions, 7693 flow [2024-11-13 13:43:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:43:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 13:43:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-11-13 13:43:25,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-13 13:43:25,736 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3257 flow. Second operand 12 states and 142 transitions. [2024-11-13 13:43:25,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 531 transitions, 7693 flow [2024-11-13 13:43:25,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 531 transitions, 7538 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-11-13 13:43:25,826 INFO L231 Difference]: Finished difference. Result has 106 places, 333 transitions, 5155 flow [2024-11-13 13:43:25,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5155, PETRI_PLACES=106, PETRI_TRANSITIONS=333} [2024-11-13 13:43:25,830 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-11-13 13:43:25,830 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 333 transitions, 5155 flow [2024-11-13 13:43:25,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-13 13:43:25,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:25,831 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:25,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:43:26,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:26,031 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:26,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1221018263, now seen corresponding path program 2 times [2024-11-13 13:43:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492548872] [2024-11-13 13:43:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:26,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:26,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492548872] [2024-11-13 13:43:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492548872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:26,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130126158] [2024-11-13 13:43:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:43:26,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:26,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:26,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:43:26,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:43:26,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:26,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:43:26,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:26,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130126158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:26,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-13 13:43:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145450905] [2024-11-13 13:43:26,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:26,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 13:43:26,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 13:43:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:43:26,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:26,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 333 transitions, 5155 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-13 13:43:26,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:26,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:26,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:27,734 INFO L124 PetriNetUnfolderBase]: 2369/4322 cut-off events. [2024-11-13 13:43:27,734 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-11-13 13:43:27,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28318 conditions, 4322 events. 2369/4322 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29722 event pairs, 157 based on Foata normal form. 28/4349 useless extension candidates. Maximal degree in co-relation 27966. Up to 1472 conditions per place. [2024-11-13 13:43:27,819 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 312 selfloop transitions, 275 changer transitions 0/590 dead transitions. [2024-11-13 13:43:27,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 590 transitions, 9758 flow [2024-11-13 13:43:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:43:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:43:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-11-13 13:43:27,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-13 13:43:27,821 INFO L175 Difference]: Start difference. First operand has 106 places, 333 transitions, 5155 flow. Second operand 14 states and 162 transitions. [2024-11-13 13:43:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 590 transitions, 9758 flow [2024-11-13 13:43:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 590 transitions, 9355 flow, removed 195 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:28,098 INFO L231 Difference]: Finished difference. Result has 123 places, 432 transitions, 7318 flow [2024-11-13 13:43:28,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7318, PETRI_PLACES=123, PETRI_TRANSITIONS=432} [2024-11-13 13:43:28,100 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2024-11-13 13:43:28,100 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 432 transitions, 7318 flow [2024-11-13 13:43:28,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-13 13:43:28,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:28,101 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:28,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 13:43:28,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:43:28,301 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:28,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1555952258, now seen corresponding path program 3 times [2024-11-13 13:43:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516214387] [2024-11-13 13:43:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:28,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516214387] [2024-11-13 13:43:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516214387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379354003] [2024-11-13 13:43:28,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:43:28,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:28,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:28,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:43:28,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 13:43:28,859 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:28,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:43:28,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:29,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:43:30,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379354003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:30,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:30,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-13 13:43:30,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724531569] [2024-11-13 13:43:30,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:30,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:43:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:43:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:43:30,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:30,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 432 transitions, 7318 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:30,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:30,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:32,673 INFO L124 PetriNetUnfolderBase]: 3537/6493 cut-off events. [2024-11-13 13:43:32,673 INFO L125 PetriNetUnfolderBase]: For 72523/72523 co-relation queries the response was YES. [2024-11-13 13:43:32,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45371 conditions, 6493 events. 3537/6493 cut-off events. For 72523/72523 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46387 event pairs, 285 based on Foata normal form. 33/6525 useless extension candidates. Maximal degree in co-relation 44748. Up to 4009 conditions per place. [2024-11-13 13:43:32,751 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 561 selfloop transitions, 230 changer transitions 24/818 dead transitions. [2024-11-13 13:43:32,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 818 transitions, 15019 flow [2024-11-13 13:43:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:43:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 13:43:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2024-11-13 13:43:32,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-13 13:43:32,755 INFO L175 Difference]: Start difference. First operand has 123 places, 432 transitions, 7318 flow. Second operand 16 states and 208 transitions. [2024-11-13 13:43:32,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 818 transitions, 15019 flow [2024-11-13 13:43:33,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 818 transitions, 14640 flow, removed 184 selfloop flow, removed 2 redundant places. [2024-11-13 13:43:33,410 INFO L231 Difference]: Finished difference. Result has 143 places, 606 transitions, 11219 flow [2024-11-13 13:43:33,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11219, PETRI_PLACES=143, PETRI_TRANSITIONS=606} [2024-11-13 13:43:33,411 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-11-13 13:43:33,412 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 606 transitions, 11219 flow [2024-11-13 13:43:33,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:43:33,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:43:33,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:43:33,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:43:33,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 13:43:33,613 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:43:33,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:43:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1377375930, now seen corresponding path program 4 times [2024-11-13 13:43:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:43:33,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238651878] [2024-11-13 13:43:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:43:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:43:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:43:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:43:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238651878] [2024-11-13 13:43:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238651878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:43:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767464032] [2024-11-13 13:43:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:43:34,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:43:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:43:34,159 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:43:34,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:43:34,251 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:43:34,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:43:34,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:43:34,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:43:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:43:38,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:43:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:43:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767464032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:43:39,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:43:39,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-13 13:43:39,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318449310] [2024-11-13 13:43:39,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:43:39,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:43:39,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:43:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:43:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-11-13 13:43:39,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:43:39,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 606 transitions, 11219 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-13 13:43:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:43:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:43:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:43:45,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 13:43:49,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 13:43:53,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 13:43:58,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 13:44:01,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 13:44:02,980 INFO L124 PetriNetUnfolderBase]: 4456/8220 cut-off events. [2024-11-13 13:44:02,980 INFO L125 PetriNetUnfolderBase]: For 112633/112633 co-relation queries the response was YES. [2024-11-13 13:44:03,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61388 conditions, 8220 events. 4456/8220 cut-off events. For 112633/112633 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 61825 event pairs, 383 based on Foata normal form. 14/8233 useless extension candidates. Maximal degree in co-relation 60659. Up to 6235 conditions per place. [2024-11-13 13:44:03,059 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 703 selfloop transitions, 239 changer transitions 23/968 dead transitions. [2024-11-13 13:44:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 968 transitions, 19067 flow [2024-11-13 13:44:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 13:44:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 13:44:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 280 transitions. [2024-11-13 13:44:03,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-13 13:44:03,061 INFO L175 Difference]: Start difference. First operand has 143 places, 606 transitions, 11219 flow. Second operand 21 states and 280 transitions. [2024-11-13 13:44:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 968 transitions, 19067 flow [2024-11-13 13:44:03,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 968 transitions, 18421 flow, removed 305 selfloop flow, removed 7 redundant places. [2024-11-13 13:44:03,778 INFO L231 Difference]: Finished difference. Result has 165 places, 792 transitions, 15614 flow [2024-11-13 13:44:03,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10778, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15614, PETRI_PLACES=165, PETRI_TRANSITIONS=792} [2024-11-13 13:44:03,779 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2024-11-13 13:44:03,779 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 792 transitions, 15614 flow [2024-11-13 13:44:03,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-13 13:44:03,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:03,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:03,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 13:44:03,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 13:44:03,982 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:03,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash 299164048, now seen corresponding path program 5 times [2024-11-13 13:44:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647690003] [2024-11-13 13:44:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:04,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:04,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647690003] [2024-11-13 13:44:04,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647690003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:04,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760083916] [2024-11-13 13:44:04,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:44:04,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:04,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:04,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:44:04,465 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 13:44:04,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:44:04,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:44:04,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:04,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:44:05,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760083916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:05,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:05,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-13 13:44:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642624002] [2024-11-13 13:44:05,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:05,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:44:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:44:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:44:05,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:05,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 792 transitions, 15614 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-13 13:44:05,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:05,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:05,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:44:09,467 INFO L124 PetriNetUnfolderBase]: 5151/9481 cut-off events. [2024-11-13 13:44:09,467 INFO L125 PetriNetUnfolderBase]: For 151225/151225 co-relation queries the response was YES. [2024-11-13 13:44:09,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73342 conditions, 9481 events. 5151/9481 cut-off events. For 151225/151225 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 73163 event pairs, 423 based on Foata normal form. 10/9490 useless extension candidates. Maximal degree in co-relation 72103. Up to 4792 conditions per place. [2024-11-13 13:44:09,637 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 438 selfloop transitions, 654 changer transitions 12/1107 dead transitions. [2024-11-13 13:44:09,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1107 transitions, 23559 flow [2024-11-13 13:44:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 13:44:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 13:44:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 237 transitions. [2024-11-13 13:44:09,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-11-13 13:44:09,639 INFO L175 Difference]: Start difference. First operand has 165 places, 792 transitions, 15614 flow. Second operand 20 states and 237 transitions. [2024-11-13 13:44:09,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1107 transitions, 23559 flow [2024-11-13 13:44:10,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 1107 transitions, 22715 flow, removed 405 selfloop flow, removed 7 redundant places. [2024-11-13 13:44:10,815 INFO L231 Difference]: Finished difference. Result has 186 places, 1011 transitions, 22457 flow [2024-11-13 13:44:10,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14966, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22457, PETRI_PLACES=186, PETRI_TRANSITIONS=1011} [2024-11-13 13:44:10,816 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2024-11-13 13:44:10,816 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 1011 transitions, 22457 flow [2024-11-13 13:44:10,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-11-13 13:44:10,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:10,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:10,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:44:11,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:11,017 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:11,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash 998354729, now seen corresponding path program 6 times [2024-11-13 13:44:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:11,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200701912] [2024-11-13 13:44:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:11,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200701912] [2024-11-13 13:44:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200701912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700408853] [2024-11-13 13:44:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:44:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:11,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:11,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:44:11,178 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 13:44:11,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:44:11,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:44:11,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:11,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:11,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700408853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:11,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 13:44:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158539128] [2024-11-13 13:44:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:11,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:44:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:44:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:44:11,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:11,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 1011 transitions, 22457 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-13 13:44:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:11,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:11,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:44:15,015 INFO L124 PetriNetUnfolderBase]: 6035/10976 cut-off events. [2024-11-13 13:44:15,015 INFO L125 PetriNetUnfolderBase]: For 198953/198953 co-relation queries the response was YES. [2024-11-13 13:44:15,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91451 conditions, 10976 events. 6035/10976 cut-off events. For 198953/198953 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 86210 event pairs, 443 based on Foata normal form. 146/11121 useless extension candidates. Maximal degree in co-relation 89442. Up to 4519 conditions per place. [2024-11-13 13:44:15,289 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 787 selfloop transitions, 705 changer transitions 0/1495 dead transitions. [2024-11-13 13:44:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 1495 transitions, 34235 flow [2024-11-13 13:44:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:44:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:44:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-11-13 13:44:15,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-13 13:44:15,290 INFO L175 Difference]: Start difference. First operand has 186 places, 1011 transitions, 22457 flow. Second operand 14 states and 163 transitions. [2024-11-13 13:44:15,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 1495 transitions, 34235 flow [2024-11-13 13:44:16,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1495 transitions, 33137 flow, removed 540 selfloop flow, removed 5 redundant places. [2024-11-13 13:44:16,784 INFO L231 Difference]: Finished difference. Result has 202 places, 1202 transitions, 28767 flow [2024-11-13 13:44:16,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21487, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28767, PETRI_PLACES=202, PETRI_TRANSITIONS=1202} [2024-11-13 13:44:16,785 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2024-11-13 13:44:16,785 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 1202 transitions, 28767 flow [2024-11-13 13:44:16,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-11-13 13:44:16,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:16,786 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:16,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 13:44:16,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:16,986 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:16,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:16,986 INFO L85 PathProgramCache]: Analyzing trace with hash 76268311, now seen corresponding path program 7 times [2024-11-13 13:44:16,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:16,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734980100] [2024-11-13 13:44:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:16,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:44:17,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734980100] [2024-11-13 13:44:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734980100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649553226] [2024-11-13 13:44:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:44:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:17,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:17,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 13:44:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:17,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:44:17,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:17,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:44:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649553226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:17,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-13 13:44:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461754202] [2024-11-13 13:44:17,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:17,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 13:44:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 13:44:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:44:17,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:17,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1202 transitions, 28767 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-13 13:44:17,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:17,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:17,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:44:22,804 INFO L124 PetriNetUnfolderBase]: 6481/11704 cut-off events. [2024-11-13 13:44:22,804 INFO L125 PetriNetUnfolderBase]: For 269164/269167 co-relation queries the response was YES. [2024-11-13 13:44:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107684 conditions, 11704 events. 6481/11704 cut-off events. For 269164/269167 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 92593 event pairs, 48 based on Foata normal form. 66/11768 useless extension candidates. Maximal degree in co-relation 104972. Up to 3277 conditions per place. [2024-11-13 13:44:22,943 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1139 selfloop transitions, 559 changer transitions 0/1701 dead transitions. [2024-11-13 13:44:22,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1701 transitions, 40074 flow [2024-11-13 13:44:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 13:44:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 13:44:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-11-13 13:44:22,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-11-13 13:44:22,945 INFO L175 Difference]: Start difference. First operand has 202 places, 1202 transitions, 28767 flow. Second operand 15 states and 167 transitions. [2024-11-13 13:44:22,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1701 transitions, 40074 flow [2024-11-13 13:44:25,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1701 transitions, 39785 flow, removed 139 selfloop flow, removed 2 redundant places. [2024-11-13 13:44:25,324 INFO L231 Difference]: Finished difference. Result has 216 places, 1283 transitions, 31897 flow [2024-11-13 13:44:25,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28108, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=31897, PETRI_PLACES=216, PETRI_TRANSITIONS=1283} [2024-11-13 13:44:25,325 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-11-13 13:44:25,325 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 1283 transitions, 31897 flow [2024-11-13 13:44:25,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-11-13 13:44:25,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:25,325 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:25,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 13:44:25,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:25,526 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:25,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1583413616, now seen corresponding path program 8 times [2024-11-13 13:44:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:25,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449607991] [2024-11-13 13:44:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:26,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449607991] [2024-11-13 13:44:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449607991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237468477] [2024-11-13 13:44:26,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:44:26,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:26,075 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:26,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 13:44:26,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:44:26,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:44:26,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:44:26,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:26,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:44:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237468477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:26,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-13 13:44:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782501654] [2024-11-13 13:44:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:26,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:44:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:44:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:44:26,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:26,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1283 transitions, 31897 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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) [2024-11-13 13:44:26,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:26,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:26,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:44:35,570 INFO L124 PetriNetUnfolderBase]: 7521/13525 cut-off events. [2024-11-13 13:44:35,571 INFO L125 PetriNetUnfolderBase]: For 350774/350774 co-relation queries the response was YES. [2024-11-13 13:44:35,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131467 conditions, 13525 events. 7521/13525 cut-off events. For 350774/350774 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 109100 event pairs, 531 based on Foata normal form. 18/13542 useless extension candidates. Maximal degree in co-relation 128632. Up to 6408 conditions per place. [2024-11-13 13:44:35,734 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 581 selfloop transitions, 1147 changer transitions 23/1754 dead transitions. [2024-11-13 13:44:35,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1754 transitions, 46724 flow [2024-11-13 13:44:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 13:44:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-13 13:44:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 286 transitions. [2024-11-13 13:44:35,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-11-13 13:44:35,736 INFO L175 Difference]: Start difference. First operand has 216 places, 1283 transitions, 31897 flow. Second operand 25 states and 286 transitions. [2024-11-13 13:44:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1754 transitions, 46724 flow [2024-11-13 13:44:39,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1754 transitions, 45938 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-11-13 13:44:39,207 INFO L231 Difference]: Finished difference. Result has 247 places, 1617 transitions, 45258 flow [2024-11-13 13:44:39,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31467, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45258, PETRI_PLACES=247, PETRI_TRANSITIONS=1617} [2024-11-13 13:44:39,209 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2024-11-13 13:44:39,209 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 1617 transitions, 45258 flow [2024-11-13 13:44:39,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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) [2024-11-13 13:44:39,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:39,209 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:39,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 13:44:39,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:39,410 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:39,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 136700836, now seen corresponding path program 9 times [2024-11-13 13:44:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539599570] [2024-11-13 13:44:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539599570] [2024-11-13 13:44:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539599570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644751999] [2024-11-13 13:44:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:44:39,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:39,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:39,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 13:44:39,909 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:44:39,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:44:39,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:44:39,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:40,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:44:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644751999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:40,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-13 13:44:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253172725] [2024-11-13 13:44:40,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:40,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:44:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:44:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:44:40,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 1617 transitions, 45258 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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) [2024-11-13 13:44:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:44:51,564 INFO L124 PetriNetUnfolderBase]: 8967/16080 cut-off events. [2024-11-13 13:44:51,564 INFO L125 PetriNetUnfolderBase]: For 477657/477660 co-relation queries the response was YES. [2024-11-13 13:44:51,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167798 conditions, 16080 events. 8967/16080 cut-off events. For 477657/477660 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 132957 event pairs, 686 based on Foata normal form. 22/16100 useless extension candidates. Maximal degree in co-relation 165466. Up to 7699 conditions per place. [2024-11-13 13:44:51,807 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 675 selfloop transitions, 1501 changer transitions 29/2208 dead transitions. [2024-11-13 13:44:51,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 2208 transitions, 66177 flow [2024-11-13 13:44:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 13:44:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 13:44:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 304 transitions. [2024-11-13 13:44:51,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-11-13 13:44:51,810 INFO L175 Difference]: Start difference. First operand has 247 places, 1617 transitions, 45258 flow. Second operand 27 states and 304 transitions. [2024-11-13 13:44:51,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 2208 transitions, 66177 flow [2024-11-13 13:44:57,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 2208 transitions, 63034 flow, removed 1499 selfloop flow, removed 5 redundant places. [2024-11-13 13:44:57,882 INFO L231 Difference]: Finished difference. Result has 281 places, 2063 transitions, 60651 flow [2024-11-13 13:44:57,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=43198, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=60651, PETRI_PLACES=281, PETRI_TRANSITIONS=2063} [2024-11-13 13:44:57,884 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2024-11-13 13:44:57,884 INFO L471 AbstractCegarLoop]: Abstraction has has 281 places, 2063 transitions, 60651 flow [2024-11-13 13:44:57,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 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) [2024-11-13 13:44:57,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:44:57,884 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:44:57,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 13:44:58,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:58,085 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:44:58,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:44:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1482300805, now seen corresponding path program 10 times [2024-11-13 13:44:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:44:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183315184] [2024-11-13 13:44:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:44:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:44:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:44:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:44:58,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:44:58,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183315184] [2024-11-13 13:44:58,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183315184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:44:58,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819384226] [2024-11-13 13:44:58,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:44:58,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:44:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:44:58,157 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:44:58,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 13:44:58,230 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:44:58,230 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:44:58,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:44:58,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:44:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:44:58,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:44:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:44:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819384226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:44:58,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:44:58,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 13:44:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322305186] [2024-11-13 13:44:58,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:44:58,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:44:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:44:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:44:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:44:58,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:44:58,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 2063 transitions, 60651 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 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) [2024-11-13 13:44:58,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:44:58,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:44:58,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:45:12,216 INFO L124 PetriNetUnfolderBase]: 9111/16043 cut-off events. [2024-11-13 13:45:12,216 INFO L125 PetriNetUnfolderBase]: For 519695/519695 co-relation queries the response was YES. [2024-11-13 13:45:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173730 conditions, 16043 events. 9111/16043 cut-off events. For 519695/519695 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 129341 event pairs, 660 based on Foata normal form. 995/17037 useless extension candidates. Maximal degree in co-relation 172256. Up to 12454 conditions per place. [2024-11-13 13:45:12,466 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1941 selfloop transitions, 480 changer transitions 0/2424 dead transitions. [2024-11-13 13:45:12,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 2424 transitions, 73901 flow [2024-11-13 13:45:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:45:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 13:45:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-11-13 13:45:12,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-13 13:45:12,467 INFO L175 Difference]: Start difference. First operand has 281 places, 2063 transitions, 60651 flow. Second operand 13 states and 158 transitions. [2024-11-13 13:45:12,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 2424 transitions, 73901 flow [2024-11-13 13:45:19,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2424 transitions, 70089 flow, removed 1895 selfloop flow, removed 3 redundant places. [2024-11-13 13:45:19,143 INFO L231 Difference]: Finished difference. Result has 297 places, 2258 transitions, 64037 flow [2024-11-13 13:45:19,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54660, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=64037, PETRI_PLACES=297, PETRI_TRANSITIONS=2258} [2024-11-13 13:45:19,144 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2024-11-13 13:45:19,144 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 2258 transitions, 64037 flow [2024-11-13 13:45:19,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 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) [2024-11-13 13:45:19,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:45:19,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:45:19,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 13:45:19,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 13:45:19,345 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:45:19,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:45:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1076161684, now seen corresponding path program 11 times [2024-11-13 13:45:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:45:19,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200680346] [2024-11-13 13:45:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:45:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:45:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:45:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:45:19,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:45:19,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200680346] [2024-11-13 13:45:19,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200680346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:45:19,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96903882] [2024-11-13 13:45:19,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:45:19,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:45:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:45:19,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:45:19,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 13:45:19,456 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:45:19,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:45:19,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:45:19,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:45:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:45:19,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:45:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:45:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96903882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:45:19,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:45:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-13 13:45:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588680854] [2024-11-13 13:45:19,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:45:19,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 13:45:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:45:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 13:45:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-13 13:45:19,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:45:19,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 2258 transitions, 64037 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2024-11-13 13:45:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:45:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:45:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:45:28,160 INFO L124 PetriNetUnfolderBase]: 6501/11656 cut-off events. [2024-11-13 13:45:28,160 INFO L125 PetriNetUnfolderBase]: For 415902/415902 co-relation queries the response was YES. [2024-11-13 13:45:28,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121754 conditions, 11656 events. 6501/11656 cut-off events. For 415902/415902 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 93348 event pairs, 368 based on Foata normal form. 740/12395 useless extension candidates. Maximal degree in co-relation 121640. Up to 7140 conditions per place. [2024-11-13 13:45:28,344 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 1296 selfloop transitions, 394 changer transitions 2/1695 dead transitions. [2024-11-13 13:45:28,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1695 transitions, 50358 flow [2024-11-13 13:45:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:45:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:45:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-13 13:45:28,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-13 13:45:28,345 INFO L175 Difference]: Start difference. First operand has 297 places, 2258 transitions, 64037 flow. Second operand 5 states and 64 transitions. [2024-11-13 13:45:28,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1695 transitions, 50358 flow [2024-11-13 13:45:32,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1695 transitions, 48862 flow, removed 656 selfloop flow, removed 17 redundant places. [2024-11-13 13:45:32,835 INFO L231 Difference]: Finished difference. Result has 279 places, 1514 transitions, 42724 flow [2024-11-13 13:45:32,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37810, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=42724, PETRI_PLACES=279, PETRI_TRANSITIONS=1514} [2024-11-13 13:45:32,836 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2024-11-13 13:45:32,836 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 1514 transitions, 42724 flow [2024-11-13 13:45:32,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2024-11-13 13:45:32,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:45:32,836 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:45:32,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 13:45:33,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:45:33,037 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:45:33,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:45:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 527763759, now seen corresponding path program 12 times [2024-11-13 13:45:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:45:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952559399] [2024-11-13 13:45:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:45:33,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:45:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:45:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:45:33,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:45:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952559399] [2024-11-13 13:45:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952559399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:45:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121322486] [2024-11-13 13:45:33,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:45:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:45:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:45:33,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:45:33,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 13:45:33,173 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 13:45:33,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:45:33,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:45:33,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:45:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:45:33,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:45:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:45:33,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121322486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:45:33,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:45:33,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-13 13:45:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474636450] [2024-11-13 13:45:33,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:45:33,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 13:45:33,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:45:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 13:45:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:45:33,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:45:33,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1514 transitions, 42724 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:45:33,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:45:33,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:45:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:45:40,277 INFO L124 PetriNetUnfolderBase]: 6481/11593 cut-off events. [2024-11-13 13:45:40,278 INFO L125 PetriNetUnfolderBase]: For 376938/376941 co-relation queries the response was YES. [2024-11-13 13:45:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122328 conditions, 11593 events. 6481/11593 cut-off events. For 376938/376941 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 92910 event pairs, 269 based on Foata normal form. 12/11603 useless extension candidates. Maximal degree in co-relation 122223. Up to 8137 conditions per place. [2024-11-13 13:45:40,469 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1441 selfloop transitions, 149 changer transitions 7/1600 dead transitions. [2024-11-13 13:45:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1600 transitions, 47407 flow [2024-11-13 13:45:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 13:45:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 13:45:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-11-13 13:45:40,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-11-13 13:45:40,470 INFO L175 Difference]: Start difference. First operand has 279 places, 1514 transitions, 42724 flow. Second operand 15 states and 159 transitions. [2024-11-13 13:45:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1600 transitions, 47407 flow [2024-11-13 13:45:44,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1600 transitions, 47169 flow, removed 119 selfloop flow, removed 0 redundant places. [2024-11-13 13:45:44,499 INFO L231 Difference]: Finished difference. Result has 296 places, 1519 transitions, 42828 flow [2024-11-13 13:45:44,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=41994, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=42828, PETRI_PLACES=296, PETRI_TRANSITIONS=1519} [2024-11-13 13:45:44,500 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2024-11-13 13:45:44,500 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 1519 transitions, 42828 flow [2024-11-13 13:45:44,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:45:44,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:45:44,501 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:45:44,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 13:45:44,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:45:44,701 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:45:44,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:45:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2029111693, now seen corresponding path program 13 times [2024-11-13 13:45:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:45:44,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375986618] [2024-11-13 13:45:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:45:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:45:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:45:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:45:44,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:45:44,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375986618] [2024-11-13 13:45:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375986618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:45:44,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957215798] [2024-11-13 13:45:44,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:45:44,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:45:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:45:44,776 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:45:44,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73a0424-b913-4388-ac85-e14fc8f6ecf4/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:45:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:45:44,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 13:45:44,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:45:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:45:44,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:45:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:45:45,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957215798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:45:45,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:45:45,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 13:45:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006768254] [2024-11-13 13:45:45,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:45:45,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:45:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:45:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:45:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:45:45,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-13 13:45:45,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1519 transitions, 42828 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:45:45,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:45:45,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-13 13:45:45,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand