./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:24:34,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:24:34,444 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:24:34,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:24:34,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:24:34,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:24:34,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:24:34,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:24:34,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:24:34,483 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:24:34,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:24:34,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:24:34,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:24:34,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:24:34,486 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:24:34,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:24:34,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:24:34,487 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:24:34,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:24:34,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:24:34,488 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:24:34,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:24:34,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:24:34,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:24:34,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:24:34,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:24:34,491 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_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-11-28 05:24:34,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:24:34,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:24:34,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:24:34,855 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:24:34,855 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:24:34,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-28 05:24:37,904 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/data/9394eb0b1/b62ace58cf3248aa8af0c64a414ba8f3/FLAGc7c5e0e79 [2024-11-28 05:24:38,157 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:24:38,158 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-11-28 05:24:38,166 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/data/9394eb0b1/b62ace58cf3248aa8af0c64a414ba8f3/FLAGc7c5e0e79 [2024-11-28 05:24:38,184 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/data/9394eb0b1/b62ace58cf3248aa8af0c64a414ba8f3 [2024-11-28 05:24:38,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:24:38,188 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:24:38,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:24:38,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:24:38,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:24:38,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645dc295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38, skipping insertion in model container [2024-11-28 05:24:38,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,217 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:24:38,400 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_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-28 05:24:38,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:24:38,418 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:24:38,448 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_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-11-28 05:24:38,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:24:38,471 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:24:38,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38 WrapperNode [2024-11-28 05:24:38,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:24:38,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:24:38,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:24:38,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:24:38,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,517 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-11-28 05:24:38,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:24:38,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:24:38,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:24:38,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:24:38,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,535 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,560 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]. [2024-11-28 05:24:38,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:24:38,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:24:38,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:24:38,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:24:38,590 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (1/1) ... [2024-11-28 05:24:38,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:24:38,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:38,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:24:38,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:24:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:24:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:24:38,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:24:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:24:38,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:24:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:24:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:24:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:24:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:24:38,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:24:38,682 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:24:38,796 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:24:38,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:24:38,998 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:24:38,999 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:24:39,183 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:24:39,185 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 05:24:39,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:24:39 BoogieIcfgContainer [2024-11-28 05:24:39,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:24:39,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:24:39,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:24:39,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:24:39,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:24:38" (1/3) ... [2024-11-28 05:24:39,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27766781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:24:39, skipping insertion in model container [2024-11-28 05:24:39,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:24:38" (2/3) ... [2024-11-28 05:24:39,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27766781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:24:39, skipping insertion in model container [2024-11-28 05:24:39,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:24:39" (3/3) ... [2024-11-28 05:24:39,202 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-11-28 05:24:39,228 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:24:39,230 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr-alt.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 05:24:39,230 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:24:39,305 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:24:39,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-28 05:24:39,391 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-28 05:24:39,393 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:24:39,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-28 05:24:39,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-28 05:24:39,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-28 05:24:39,408 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:24:39,423 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;@7ac7acda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:24:39,424 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 05:24:39,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:24:39,434 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 05:24:39,434 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:24:39,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:39,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:39,436 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:39,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash 834448638, now seen corresponding path program 1 times [2024-11-28 05:24:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:39,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453203108] [2024-11-28 05:24:39,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:39,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:39,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453203108] [2024-11-28 05:24:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453203108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:24:39,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:24:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:24:39,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836494206] [2024-11-28 05:24:39,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:24:39,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:24:39,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:39,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:24:39,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:24:39,881 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 05:24:39,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:39,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:39,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 05:24:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:40,036 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-11-28 05:24:40,036 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 05:24:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 124 events. 61/124 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 31 based on Foata normal form. 9/128 useless extension candidates. Maximal degree in co-relation 214. Up to 86 conditions per place. [2024-11-28 05:24:40,041 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-11-28 05:24:40,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-11-28 05:24:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:24:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:24:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-28 05:24:40,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-28 05:24:40,065 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-11-28 05:24:40,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-11-28 05:24:40,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:24:40,079 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-28 05:24:40,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-28 05:24:40,087 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-28 05:24:40,088 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-28 05:24:40,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:40,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:40,088 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:40,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:24:40,089 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:40,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -731539792, now seen corresponding path program 1 times [2024-11-28 05:24:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271855370] [2024-11-28 05:24:40,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:24:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:40,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271855370] [2024-11-28 05:24:40,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271855370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:24:40,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:24:40,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:24:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225569637] [2024-11-28 05:24:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:24:40,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:24:40,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:40,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:24:40,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:24:40,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 05:24:40,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 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) [2024-11-28 05:24:40,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:40,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 05:24:40,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:40,391 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2024-11-28 05:24:40,393 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-28 05:24:40,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 174 events. 89/174 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 580 event pairs, 37 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2024-11-28 05:24:40,397 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-11-28 05:24:40,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-11-28 05:24:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:24:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:24:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-28 05:24:40,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-28 05:24:40,400 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-11-28 05:24:40,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-11-28 05:24:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:24:40,403 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-28 05:24:40,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-28 05:24:40,405 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-28 05:24:40,405 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-28 05:24:40,406 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) [2024-11-28 05:24:40,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:40,406 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:40,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:24:40,407 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:40,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash 618627102, now seen corresponding path program 1 times [2024-11-28 05:24:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536245918] [2024-11-28 05:24:40,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:41,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536245918] [2024-11-28 05:24:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536245918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082599561] [2024-11-28 05:24:41,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:41,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:41,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:41,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:24:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:41,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:24:41,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:41,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:42,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082599561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:42,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:42,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 05:24:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312983032] [2024-11-28 05:24:42,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:42,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:24:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:42,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:24:42,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:24:42,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:24:42,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:42,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:42,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:24:42,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:43,961 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-11-28 05:24:43,961 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-28 05:24:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 665 events. 387/665 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2646 event pairs, 23 based on Foata normal form. 14/679 useless extension candidates. Maximal degree in co-relation 595. Up to 218 conditions per place. [2024-11-28 05:24:43,982 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-11-28 05:24:43,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-11-28 05:24:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:24:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:24:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-11-28 05:24:43,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-11-28 05:24:43,988 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-11-28 05:24:43,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-11-28 05:24:43,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:24:43,994 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-11-28 05:24:43,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=504, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-11-28 05:24:43,996 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-11-28 05:24:43,996 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-11-28 05:24:43,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:43,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:43,996 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:44,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:44,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:44,201 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:44,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1547369548, now seen corresponding path program 2 times [2024-11-28 05:24:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840359254] [2024-11-28 05:24:44,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:44,233 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:44,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:44,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840359254] [2024-11-28 05:24:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840359254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:44,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955502697] [2024-11-28 05:24:44,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:44,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:44,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:44,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:24:44,651 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:44,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:44,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:24:44,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:44,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955502697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:45,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:45,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-28 05:24:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66039209] [2024-11-28 05:24:45,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:45,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:24:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:45,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:24:45,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:24:45,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:24:45,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:45,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:45,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:24:45,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:46,835 INFO L124 PetriNetUnfolderBase]: 575/1019 cut-off events. [2024-11-28 05:24:46,835 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2024-11-28 05:24:46,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 1019 events. 575/1019 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4724 event pairs, 35 based on Foata normal form. 2/1021 useless extension candidates. Maximal degree in co-relation 4213. Up to 292 conditions per place. [2024-11-28 05:24:46,849 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 102 selfloop transitions, 112 changer transitions 28/243 dead transitions. [2024-11-28 05:24:46,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 243 transitions, 1980 flow [2024-11-28 05:24:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:24:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:24:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 233 transitions. [2024-11-28 05:24:46,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4438095238095238 [2024-11-28 05:24:46,852 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 25 states and 233 transitions. [2024-11-28 05:24:46,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 243 transitions, 1980 flow [2024-11-28 05:24:46,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 243 transitions, 1958 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-28 05:24:46,884 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1473 flow [2024-11-28 05:24:46,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1473, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-11-28 05:24:46,885 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 81 predicate places. [2024-11-28 05:24:46,885 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1473 flow [2024-11-28 05:24:46,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:46,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:46,885 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:46,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:24:47,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:47,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:47,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1248702784, now seen corresponding path program 3 times [2024-11-28 05:24:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:47,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628328416] [2024-11-28 05:24:47,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:47,101 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:47,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628328416] [2024-11-28 05:24:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628328416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:47,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252045302] [2024-11-28 05:24:47,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:47,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:47,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:24:47,564 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:47,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:47,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:24:47,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:47,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:48,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252045302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:48,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 05:24:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805961991] [2024-11-28 05:24:48,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:48,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:24:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:48,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:24:48,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:24:48,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:24:48,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1473 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:48,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:48,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:24:48,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:50,158 INFO L124 PetriNetUnfolderBase]: 639/1130 cut-off events. [2024-11-28 05:24:50,158 INFO L125 PetriNetUnfolderBase]: For 6525/6525 co-relation queries the response was YES. [2024-11-28 05:24:50,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 1130 events. 639/1130 cut-off events. For 6525/6525 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5340 event pairs, 34 based on Foata normal form. 16/1146 useless extension candidates. Maximal degree in co-relation 6201. Up to 327 conditions per place. [2024-11-28 05:24:50,171 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 109 selfloop transitions, 121 changer transitions 36/267 dead transitions. [2024-11-28 05:24:50,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 267 transitions, 2924 flow [2024-11-28 05:24:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 05:24:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 05:24:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 263 transitions. [2024-11-28 05:24:50,174 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4174603174603175 [2024-11-28 05:24:50,175 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1473 flow. Second operand 30 states and 263 transitions. [2024-11-28 05:24:50,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 267 transitions, 2924 flow [2024-11-28 05:24:50,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 267 transitions, 2787 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-11-28 05:24:50,230 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1956 flow [2024-11-28 05:24:50,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1956, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-11-28 05:24:50,233 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-11-28 05:24:50,235 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1956 flow [2024-11-28 05:24:50,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:50,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:50,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:50,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:50,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:50,439 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:50,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash -395785280, now seen corresponding path program 4 times [2024-11-28 05:24:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105499410] [2024-11-28 05:24:50,440 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:50,455 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:50,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105499410] [2024-11-28 05:24:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105499410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506666155] [2024-11-28 05:24:50,712 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:50,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:50,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:50,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:24:50,764 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:50,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:50,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:24:50,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:51,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506666155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:51,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2024-11-28 05:24:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145865446] [2024-11-28 05:24:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:51,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:24:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:51,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:24:51,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:24:51,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:24:51,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1956 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:51,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:51,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:24:51,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:55,422 INFO L124 PetriNetUnfolderBase]: 1001/1760 cut-off events. [2024-11-28 05:24:55,422 INFO L125 PetriNetUnfolderBase]: For 15673/15673 co-relation queries the response was YES. [2024-11-28 05:24:55,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11278 conditions, 1760 events. 1001/1760 cut-off events. For 15673/15673 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9019 event pairs, 6 based on Foata normal form. 18/1778 useless extension candidates. Maximal degree in co-relation 11186. Up to 538 conditions per place. [2024-11-28 05:24:55,445 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 210 selfloop transitions, 314 changer transitions 29/554 dead transitions. [2024-11-28 05:24:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 554 transitions, 7273 flow [2024-11-28 05:24:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-28 05:24:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-11-28 05:24:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 587 transitions. [2024-11-28 05:24:55,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3936955063715627 [2024-11-28 05:24:55,449 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1956 flow. Second operand 71 states and 587 transitions. [2024-11-28 05:24:55,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 554 transitions, 7273 flow [2024-11-28 05:24:55,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 554 transitions, 6884 flow, removed 148 selfloop flow, removed 9 redundant places. [2024-11-28 05:24:55,604 INFO L231 Difference]: Finished difference. Result has 210 places, 381 transitions, 5621 flow [2024-11-28 05:24:55,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=5621, PETRI_PLACES=210, PETRI_TRANSITIONS=381} [2024-11-28 05:24:55,609 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 187 predicate places. [2024-11-28 05:24:55,609 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 381 transitions, 5621 flow [2024-11-28 05:24:55,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:55,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:55,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:55,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:24:55,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:55,815 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:55,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1697654224, now seen corresponding path program 5 times [2024-11-28 05:24:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:55,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762526828] [2024-11-28 05:24:55,816 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:24:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:55,829 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:55,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762526828] [2024-11-28 05:24:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762526828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371383635] [2024-11-28 05:24:56,123 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:24:56,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:56,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:24:56,174 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:56,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:56,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:24:56,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:56,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371383635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:56,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-11-28 05:24:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112831922] [2024-11-28 05:24:56,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:56,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:24:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:56,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:24:56,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:24:56,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:24:56,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 381 transitions, 5621 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:56,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:56,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:24:56,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:58,246 INFO L124 PetriNetUnfolderBase]: 1144/2037 cut-off events. [2024-11-28 05:24:58,246 INFO L125 PetriNetUnfolderBase]: For 19042/19042 co-relation queries the response was YES. [2024-11-28 05:24:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14354 conditions, 2037 events. 1144/2037 cut-off events. For 19042/19042 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11057 event pairs, 12 based on Foata normal form. 1/2038 useless extension candidates. Maximal degree in co-relation 14191. Up to 822 conditions per place. [2024-11-28 05:24:58,271 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 185 selfloop transitions, 365 changer transitions 9/560 dead transitions. [2024-11-28 05:24:58,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 560 transitions, 8942 flow [2024-11-28 05:24:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:24:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 05:24:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 243 transitions. [2024-11-28 05:24:58,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-11-28 05:24:58,273 INFO L175 Difference]: Start difference. First operand has 210 places, 381 transitions, 5621 flow. Second operand 29 states and 243 transitions. [2024-11-28 05:24:58,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 560 transitions, 8942 flow [2024-11-28 05:24:58,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 560 transitions, 7441 flow, removed 625 selfloop flow, removed 17 redundant places. [2024-11-28 05:24:58,489 INFO L231 Difference]: Finished difference. Result has 226 places, 483 transitions, 7173 flow [2024-11-28 05:24:58,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7173, PETRI_PLACES=226, PETRI_TRANSITIONS=483} [2024-11-28 05:24:58,490 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 203 predicate places. [2024-11-28 05:24:58,490 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 483 transitions, 7173 flow [2024-11-28 05:24:58,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:58,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:58,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:58,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:24:58,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:58,691 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:58,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash 41540544, now seen corresponding path program 6 times [2024-11-28 05:24:58,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:58,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919817177] [2024-11-28 05:24:58,692 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:24:58,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:58,707 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 05:24:58,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:24:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:58,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919817177] [2024-11-28 05:24:58,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919817177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:24:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:24:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:24:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136519910] [2024-11-28 05:24:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:24:58,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:24:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:58,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:24:58,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:24:58,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 05:24:58,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 483 transitions, 7173 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:58,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:58,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 05:24:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:24:59,692 INFO L124 PetriNetUnfolderBase]: 1001/1904 cut-off events. [2024-11-28 05:24:59,692 INFO L125 PetriNetUnfolderBase]: For 16942/16952 co-relation queries the response was YES. [2024-11-28 05:24:59,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13232 conditions, 1904 events. 1001/1904 cut-off events. For 16942/16952 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11107 event pairs, 18 based on Foata normal form. 1/1896 useless extension candidates. Maximal degree in co-relation 13110. Up to 1285 conditions per place. [2024-11-28 05:24:59,708 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 345 selfloop transitions, 44 changer transitions 6/515 dead transitions. [2024-11-28 05:24:59,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 515 transitions, 8274 flow [2024-11-28 05:24:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:24:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:24:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-11-28 05:24:59,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-28 05:24:59,710 INFO L175 Difference]: Start difference. First operand has 226 places, 483 transitions, 7173 flow. Second operand 10 states and 100 transitions. [2024-11-28 05:24:59,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 515 transitions, 8274 flow [2024-11-28 05:24:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 515 transitions, 8118 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-11-28 05:24:59,843 INFO L231 Difference]: Finished difference. Result has 226 places, 495 transitions, 7340 flow [2024-11-28 05:24:59,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7340, PETRI_PLACES=226, PETRI_TRANSITIONS=495} [2024-11-28 05:24:59,844 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 203 predicate places. [2024-11-28 05:24:59,844 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 495 transitions, 7340 flow [2024-11-28 05:24:59,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:59,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:59,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:59,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:24:59,845 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:59,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -832200136, now seen corresponding path program 7 times [2024-11-28 05:24:59,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384259704] [2024-11-28 05:24:59,846 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:24:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:00,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384259704] [2024-11-28 05:25:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384259704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:00,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:25:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33961609] [2024-11-28 05:25:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:00,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:25:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:00,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:25:00,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:25:00,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 05:25:00,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 495 transitions, 7340 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:00,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:00,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 05:25:00,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:00,951 INFO L124 PetriNetUnfolderBase]: 1009/1918 cut-off events. [2024-11-28 05:25:00,951 INFO L125 PetriNetUnfolderBase]: For 17117/17137 co-relation queries the response was YES. [2024-11-28 05:25:00,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13294 conditions, 1918 events. 1009/1918 cut-off events. For 17117/17137 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11215 event pairs, 18 based on Foata normal form. 1/1908 useless extension candidates. Maximal degree in co-relation 13170. Up to 1312 conditions per place. [2024-11-28 05:25:00,979 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 355 selfloop transitions, 43 changer transitions 4/522 dead transitions. [2024-11-28 05:25:00,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 522 transitions, 8355 flow [2024-11-28 05:25:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:25:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:25:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-11-28 05:25:00,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2024-11-28 05:25:00,980 INFO L175 Difference]: Start difference. First operand has 226 places, 495 transitions, 7340 flow. Second operand 11 states and 109 transitions. [2024-11-28 05:25:00,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 522 transitions, 8355 flow [2024-11-28 05:25:01,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 522 transitions, 8277 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-28 05:25:01,175 INFO L231 Difference]: Finished difference. Result has 232 places, 499 transitions, 7463 flow [2024-11-28 05:25:01,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7264, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7463, PETRI_PLACES=232, PETRI_TRANSITIONS=499} [2024-11-28 05:25:01,176 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 209 predicate places. [2024-11-28 05:25:01,176 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 499 transitions, 7463 flow [2024-11-28 05:25:01,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:01,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:01,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:01,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:25:01,177 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:01,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash -965365906, now seen corresponding path program 8 times [2024-11-28 05:25:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:01,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597653719] [2024-11-28 05:25:01,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:01,188 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:25:01,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:01,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:01,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597653719] [2024-11-28 05:25:01,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597653719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:01,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:01,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 05:25:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492357347] [2024-11-28 05:25:01,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:01,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:25:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:01,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:25:01,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:25:01,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 05:25:01,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 499 transitions, 7463 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:01,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:01,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 05:25:01,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:02,088 INFO L124 PetriNetUnfolderBase]: 1008/1911 cut-off events. [2024-11-28 05:25:02,089 INFO L125 PetriNetUnfolderBase]: For 17609/17629 co-relation queries the response was YES. [2024-11-28 05:25:02,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13356 conditions, 1911 events. 1008/1911 cut-off events. For 17609/17629 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11120 event pairs, 18 based on Foata normal form. 1/1901 useless extension candidates. Maximal degree in co-relation 13238. Up to 1312 conditions per place. [2024-11-28 05:25:02,105 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 351 selfloop transitions, 39 changer transitions 7/517 dead transitions. [2024-11-28 05:25:02,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 517 transitions, 8367 flow [2024-11-28 05:25:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:25:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:25:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-11-28 05:25:02,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-28 05:25:02,107 INFO L175 Difference]: Start difference. First operand has 232 places, 499 transitions, 7463 flow. Second operand 10 states and 98 transitions. [2024-11-28 05:25:02,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 517 transitions, 8367 flow [2024-11-28 05:25:02,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 8318 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 05:25:02,284 INFO L231 Difference]: Finished difference. Result has 235 places, 497 transitions, 7469 flow [2024-11-28 05:25:02,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7414, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7469, PETRI_PLACES=235, PETRI_TRANSITIONS=497} [2024-11-28 05:25:02,285 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 212 predicate places. [2024-11-28 05:25:02,285 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 497 transitions, 7469 flow [2024-11-28 05:25:02,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:02,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:02,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:02,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:25:02,286 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:02,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 597328832, now seen corresponding path program 9 times [2024-11-28 05:25:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:02,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284046760] [2024-11-28 05:25:02,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:25:02,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:02,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:25:02,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:02,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:02,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284046760] [2024-11-28 05:25:02,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284046760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:02,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398530240] [2024-11-28 05:25:02,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:25:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:02,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:02,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:25:02,615 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:25:02,616 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:02,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:25:02,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:02,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398530240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:03,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 05:25:03,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355040281] [2024-11-28 05:25:03,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:03,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:25:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:03,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:25:03,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:25:03,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:03,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 497 transitions, 7469 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:03,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:03,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:03,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:05,160 INFO L124 PetriNetUnfolderBase]: 1340/2369 cut-off events. [2024-11-28 05:25:05,161 INFO L125 PetriNetUnfolderBase]: For 18127/18127 co-relation queries the response was YES. [2024-11-28 05:25:05,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16234 conditions, 2369 events. 1340/2369 cut-off events. For 18127/18127 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13272 event pairs, 14 based on Foata normal form. 2/2371 useless extension candidates. Maximal degree in co-relation 16123. Up to 1103 conditions per place. [2024-11-28 05:25:05,180 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 262 selfloop transitions, 398 changer transitions 13/674 dead transitions. [2024-11-28 05:25:05,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 674 transitions, 10798 flow [2024-11-28 05:25:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 05:25:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-28 05:25:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 268 transitions. [2024-11-28 05:25:05,186 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38672438672438675 [2024-11-28 05:25:05,186 INFO L175 Difference]: Start difference. First operand has 235 places, 497 transitions, 7469 flow. Second operand 33 states and 268 transitions. [2024-11-28 05:25:05,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 674 transitions, 10798 flow [2024-11-28 05:25:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 674 transitions, 10629 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-28 05:25:05,455 INFO L231 Difference]: Finished difference. Result has 269 places, 601 transitions, 10392 flow [2024-11-28 05:25:05,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7319, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10392, PETRI_PLACES=269, PETRI_TRANSITIONS=601} [2024-11-28 05:25:05,457 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 246 predicate places. [2024-11-28 05:25:05,457 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 601 transitions, 10392 flow [2024-11-28 05:25:05,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:05,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:05,457 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:05,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:25:05,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:25:05,662 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:05,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:05,662 INFO L85 PathProgramCache]: Analyzing trace with hash 929091608, now seen corresponding path program 10 times [2024-11-28 05:25:05,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:05,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171667465] [2024-11-28 05:25:05,662 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:25:05,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:05,670 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:25:05,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:05,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171667465] [2024-11-28 05:25:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171667465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281827190] [2024-11-28 05:25:05,885 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:25:05,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:05,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:05,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:05,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:25:05,952 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:25:05,952 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:05,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:25:05,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:06,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:06,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281827190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:06,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 33 [2024-11-28 05:25:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063386759] [2024-11-28 05:25:06,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:06,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:25:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:06,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:25:06,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:25:06,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:06,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 601 transitions, 10392 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:06,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:06,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:06,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:15,117 INFO L124 PetriNetUnfolderBase]: 2393/4260 cut-off events. [2024-11-28 05:25:15,117 INFO L125 PetriNetUnfolderBase]: For 43112/43112 co-relation queries the response was YES. [2024-11-28 05:25:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33539 conditions, 4260 events. 2393/4260 cut-off events. For 43112/43112 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26944 event pairs, 49 based on Foata normal form. 13/4273 useless extension candidates. Maximal degree in co-relation 33351. Up to 1341 conditions per place. [2024-11-28 05:25:15,159 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 467 selfloop transitions, 898 changer transitions 95/1461 dead transitions. [2024-11-28 05:25:15,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1461 transitions, 25183 flow [2024-11-28 05:25:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2024-11-28 05:25:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2024-11-28 05:25:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 1183 transitions. [2024-11-28 05:25:15,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2024-11-28 05:25:15,165 INFO L175 Difference]: Start difference. First operand has 269 places, 601 transitions, 10392 flow. Second operand 160 states and 1183 transitions. [2024-11-28 05:25:15,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1461 transitions, 25183 flow [2024-11-28 05:25:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1461 transitions, 24930 flow, removed 56 selfloop flow, removed 12 redundant places. [2024-11-28 05:25:15,734 INFO L231 Difference]: Finished difference. Result has 445 places, 1115 transitions, 22039 flow [2024-11-28 05:25:15,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=160, PETRI_FLOW=22039, PETRI_PLACES=445, PETRI_TRANSITIONS=1115} [2024-11-28 05:25:15,736 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-11-28 05:25:15,736 INFO L471 AbstractCegarLoop]: Abstraction has has 445 places, 1115 transitions, 22039 flow [2024-11-28 05:25:15,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:15,736 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:15,736 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:15,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:15,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:25:15,937 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:15,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1379010452, now seen corresponding path program 11 times [2024-11-28 05:25:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587483082] [2024-11-28 05:25:15,937 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:25:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:15,946 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:25:15,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:16,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587483082] [2024-11-28 05:25:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587483082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128418790] [2024-11-28 05:25:16,264 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:25:16,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:16,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:16,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:25:16,308 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:25:16,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:16,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:25:16,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:16,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:17,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128418790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:17,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:17,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:25:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938558735] [2024-11-28 05:25:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:17,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:25:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:17,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:25:17,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:25:17,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:17,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1115 transitions, 22039 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:17,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:17,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:17,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:22,051 INFO L124 PetriNetUnfolderBase]: 2480/4499 cut-off events. [2024-11-28 05:25:22,051 INFO L125 PetriNetUnfolderBase]: For 61035/61035 co-relation queries the response was YES. [2024-11-28 05:25:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39302 conditions, 4499 events. 2480/4499 cut-off events. For 61035/61035 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29364 event pairs, 82 based on Foata normal form. 3/4502 useless extension candidates. Maximal degree in co-relation 39084. Up to 1412 conditions per place. [2024-11-28 05:25:22,095 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 527 selfloop transitions, 828 changer transitions 19/1375 dead transitions. [2024-11-28 05:25:22,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1375 transitions, 28370 flow [2024-11-28 05:25:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-28 05:25:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-28 05:25:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 499 transitions. [2024-11-28 05:25:22,098 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.409688013136289 [2024-11-28 05:25:22,098 INFO L175 Difference]: Start difference. First operand has 445 places, 1115 transitions, 22039 flow. Second operand 58 states and 499 transitions. [2024-11-28 05:25:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1375 transitions, 28370 flow [2024-11-28 05:25:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1375 transitions, 26372 flow, removed 578 selfloop flow, removed 28 redundant places. [2024-11-28 05:25:23,124 INFO L231 Difference]: Finished difference. Result has 470 places, 1207 transitions, 24757 flow [2024-11-28 05:25:23,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20393, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=745, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=24757, PETRI_PLACES=470, PETRI_TRANSITIONS=1207} [2024-11-28 05:25:23,126 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 447 predicate places. [2024-11-28 05:25:23,126 INFO L471 AbstractCegarLoop]: Abstraction has has 470 places, 1207 transitions, 24757 flow [2024-11-28 05:25:23,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:23,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:23,126 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:23,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:23,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:25:23,327 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:23,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1895963532, now seen corresponding path program 12 times [2024-11-28 05:25:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:23,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592548963] [2024-11-28 05:25:23,328 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:25:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:23,343 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:25:23,343 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:23,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:23,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592548963] [2024-11-28 05:25:23,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592548963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:23,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762994053] [2024-11-28 05:25:23,641 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:25:23,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:23,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:23,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:23,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:25:23,694 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:25:23,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:23,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:25:23,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:24,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762994053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:24,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:25:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921114839] [2024-11-28 05:25:24,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:24,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:25:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:24,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:25:24,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:25:24,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:24,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1207 transitions, 24757 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:24,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:24,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:24,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:33,160 INFO L124 PetriNetUnfolderBase]: 3234/5917 cut-off events. [2024-11-28 05:25:33,160 INFO L125 PetriNetUnfolderBase]: For 89697/89697 co-relation queries the response was YES. [2024-11-28 05:25:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52842 conditions, 5917 events. 3234/5917 cut-off events. For 89697/89697 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 40348 event pairs, 56 based on Foata normal form. 25/5942 useless extension candidates. Maximal degree in co-relation 52739. Up to 1854 conditions per place. [2024-11-28 05:25:33,237 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 602 selfloop transitions, 1124 changer transitions 47/1774 dead transitions. [2024-11-28 05:25:33,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1774 transitions, 37695 flow [2024-11-28 05:25:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-28 05:25:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2024-11-28 05:25:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 756 transitions. [2024-11-28 05:25:33,242 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3829787234042553 [2024-11-28 05:25:33,242 INFO L175 Difference]: Start difference. First operand has 470 places, 1207 transitions, 24757 flow. Second operand 94 states and 756 transitions. [2024-11-28 05:25:33,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1774 transitions, 37695 flow [2024-11-28 05:25:35,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1774 transitions, 36759 flow, removed 154 selfloop flow, removed 25 redundant places. [2024-11-28 05:25:35,216 INFO L231 Difference]: Finished difference. Result has 574 places, 1528 transitions, 35234 flow [2024-11-28 05:25:35,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23988, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=35234, PETRI_PLACES=574, PETRI_TRANSITIONS=1528} [2024-11-28 05:25:35,218 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 551 predicate places. [2024-11-28 05:25:35,218 INFO L471 AbstractCegarLoop]: Abstraction has has 574 places, 1528 transitions, 35234 flow [2024-11-28 05:25:35,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:35,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:35,219 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:35,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:35,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:25:35,420 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:35,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1736612206, now seen corresponding path program 13 times [2024-11-28 05:25:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962310739] [2024-11-28 05:25:35,420 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:25:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:35,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:35,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962310739] [2024-11-28 05:25:35,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962310739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:35,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71626529] [2024-11-28 05:25:35,695 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:25:35,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:35,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:35,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:25:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:35,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:25:35,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:36,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71626529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:36,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:36,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:25:36,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618550181] [2024-11-28 05:25:36,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:36,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:25:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:36,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:25:36,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:25:36,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:36,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1528 transitions, 35234 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:36,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:36,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:36,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:46,600 INFO L124 PetriNetUnfolderBase]: 3813/7021 cut-off events. [2024-11-28 05:25:46,600 INFO L125 PetriNetUnfolderBase]: For 127752/127752 co-relation queries the response was YES. [2024-11-28 05:25:46,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68136 conditions, 7021 events. 3813/7021 cut-off events. For 127752/127752 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 50379 event pairs, 65 based on Foata normal form. 11/7032 useless extension candidates. Maximal degree in co-relation 68001. Up to 2089 conditions per place. [2024-11-28 05:25:46,711 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 614 selfloop transitions, 1458 changer transitions 44/2117 dead transitions. [2024-11-28 05:25:46,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2117 transitions, 49447 flow [2024-11-28 05:25:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-28 05:25:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-11-28 05:25:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 896 transitions. [2024-11-28 05:25:46,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3775811209439528 [2024-11-28 05:25:46,715 INFO L175 Difference]: Start difference. First operand has 574 places, 1528 transitions, 35234 flow. Second operand 113 states and 896 transitions. [2024-11-28 05:25:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2117 transitions, 49447 flow [2024-11-28 05:25:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 2117 transitions, 48925 flow, removed 193 selfloop flow, removed 24 redundant places. [2024-11-28 05:25:50,042 INFO L231 Difference]: Finished difference. Result has 684 places, 1835 transitions, 47257 flow [2024-11-28 05:25:50,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34925, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=47257, PETRI_PLACES=684, PETRI_TRANSITIONS=1835} [2024-11-28 05:25:50,044 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 661 predicate places. [2024-11-28 05:25:50,044 INFO L471 AbstractCegarLoop]: Abstraction has has 684 places, 1835 transitions, 47257 flow [2024-11-28 05:25:50,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:50,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:50,045 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:50,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:25:50,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:50,250 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:50,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 680519014, now seen corresponding path program 14 times [2024-11-28 05:25:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:50,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410322183] [2024-11-28 05:25:50,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:50,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:50,260 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:50,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:50,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:50,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410322183] [2024-11-28 05:25:50,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410322183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:50,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096979076] [2024-11-28 05:25:50,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:50,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:50,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:50,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:25:50,664 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:50,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:50,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:25:50,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:51,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:51,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096979076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:51,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:51,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:25:51,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205086852] [2024-11-28 05:25:51,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:51,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:25:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:51,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:25:51,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:25:51,673 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:25:51,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 1835 transitions, 47257 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:51,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:51,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:25:51,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:00,944 INFO L124 PetriNetUnfolderBase]: 4109/7547 cut-off events. [2024-11-28 05:26:00,945 INFO L125 PetriNetUnfolderBase]: For 162394/162394 co-relation queries the response was YES. [2024-11-28 05:26:01,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79578 conditions, 7547 events. 4109/7547 cut-off events. For 162394/162394 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 54683 event pairs, 83 based on Foata normal form. 9/7556 useless extension candidates. Maximal degree in co-relation 79425. Up to 2691 conditions per place. [2024-11-28 05:26:01,069 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 690 selfloop transitions, 1513 changer transitions 25/2229 dead transitions. [2024-11-28 05:26:01,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 2229 transitions, 58235 flow [2024-11-28 05:26:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 05:26:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-11-28 05:26:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 702 transitions. [2024-11-28 05:26:01,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39327731092436974 [2024-11-28 05:26:01,072 INFO L175 Difference]: Start difference. First operand has 684 places, 1835 transitions, 47257 flow. Second operand 85 states and 702 transitions. [2024-11-28 05:26:01,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 2229 transitions, 58235 flow [2024-11-28 05:26:06,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2229 transitions, 57249 flow, removed 262 selfloop flow, removed 36 redundant places. [2024-11-28 05:26:06,066 INFO L231 Difference]: Finished difference. Result has 753 places, 2015 transitions, 56337 flow [2024-11-28 05:26:06,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=46454, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=56337, PETRI_PLACES=753, PETRI_TRANSITIONS=2015} [2024-11-28 05:26:06,068 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 730 predicate places. [2024-11-28 05:26:06,068 INFO L471 AbstractCegarLoop]: Abstraction has has 753 places, 2015 transitions, 56337 flow [2024-11-28 05:26:06,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:06,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:06,069 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:06,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:26:06,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:26:06,270 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:26:06,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 734104924, now seen corresponding path program 15 times [2024-11-28 05:26:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447824149] [2024-11-28 05:26:06,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:06,276 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:26:06,276 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447824149] [2024-11-28 05:26:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447824149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413446199] [2024-11-28 05:26:06,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:06,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:06,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:26:06,592 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:26:06,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:06,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:26:06,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:06,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413446199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:07,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:26:07,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 05:26:07,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831596886] [2024-11-28 05:26:07,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:07,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:26:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:07,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:26:07,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:26:07,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:26:07,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 2015 transitions, 56337 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:07,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:07,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:26:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:15,079 INFO L124 PetriNetUnfolderBase]: 4205/7610 cut-off events. [2024-11-28 05:26:15,079 INFO L125 PetriNetUnfolderBase]: For 205634/205634 co-relation queries the response was YES. [2024-11-28 05:26:15,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87731 conditions, 7610 events. 4205/7610 cut-off events. For 205634/205634 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 54681 event pairs, 101 based on Foata normal form. 165/7775 useless extension candidates. Maximal degree in co-relation 87559. Up to 3076 conditions per place. [2024-11-28 05:26:15,251 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 966 selfloop transitions, 1179 changer transitions 21/2167 dead transitions. [2024-11-28 05:26:15,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 2167 transitions, 63709 flow [2024-11-28 05:26:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 05:26:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-28 05:26:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 374 transitions. [2024-11-28 05:26:15,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39576719576719577 [2024-11-28 05:26:15,253 INFO L175 Difference]: Start difference. First operand has 753 places, 2015 transitions, 56337 flow. Second operand 45 states and 374 transitions. [2024-11-28 05:26:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 2167 transitions, 63709 flow [2024-11-28 05:26:21,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 2167 transitions, 62281 flow, removed 229 selfloop flow, removed 49 redundant places. [2024-11-28 05:26:21,842 INFO L231 Difference]: Finished difference. Result has 713 places, 2013 transitions, 60602 flow [2024-11-28 05:26:21,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=51518, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=60602, PETRI_PLACES=713, PETRI_TRANSITIONS=2013} [2024-11-28 05:26:21,845 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 690 predicate places. [2024-11-28 05:26:21,845 INFO L471 AbstractCegarLoop]: Abstraction has has 713 places, 2013 transitions, 60602 flow [2024-11-28 05:26:21,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:21,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:21,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:21,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:26:22,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:26:22,046 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:26:22,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2115666886, now seen corresponding path program 16 times [2024-11-28 05:26:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:22,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035460466] [2024-11-28 05:26:22,047 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:22,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:22,054 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:22,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:22,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:22,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035460466] [2024-11-28 05:26:22,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035460466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:22,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961871018] [2024-11-28 05:26:22,356 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:22,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:22,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:26:22,415 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:22,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:22,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:26:22,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:22,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:23,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961871018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:23,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:26:23,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 05:26:23,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130710600] [2024-11-28 05:26:23,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:23,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:26:23,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:23,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:26:23,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:26:23,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:26:23,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 2013 transitions, 60602 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:23,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:23,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:26:23,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:37,738 INFO L124 PetriNetUnfolderBase]: 5170/9417 cut-off events. [2024-11-28 05:26:37,738 INFO L125 PetriNetUnfolderBase]: For 297504/297504 co-relation queries the response was YES. [2024-11-28 05:26:37,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114910 conditions, 9417 events. 5170/9417 cut-off events. For 297504/297504 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 71156 event pairs, 98 based on Foata normal form. 7/9424 useless extension candidates. Maximal degree in co-relation 114749. Up to 3368 conditions per place. [2024-11-28 05:26:37,923 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 714 selfloop transitions, 1973 changer transitions 29/2717 dead transitions. [2024-11-28 05:26:37,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2717 transitions, 83577 flow [2024-11-28 05:26:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-28 05:26:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2024-11-28 05:26:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 761 transitions. [2024-11-28 05:26:37,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36977648202137997 [2024-11-28 05:26:37,926 INFO L175 Difference]: Start difference. First operand has 713 places, 2013 transitions, 60602 flow. Second operand 98 states and 761 transitions. [2024-11-28 05:26:37,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2717 transitions, 83577 flow [2024-11-28 05:26:49,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 2717 transitions, 83213 flow, removed 99 selfloop flow, removed 15 redundant places. [2024-11-28 05:26:49,460 INFO L231 Difference]: Finished difference. Result has 825 places, 2493 transitions, 82635 flow [2024-11-28 05:26:49,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60322, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=82635, PETRI_PLACES=825, PETRI_TRANSITIONS=2493} [2024-11-28 05:26:49,462 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 802 predicate places. [2024-11-28 05:26:49,462 INFO L471 AbstractCegarLoop]: Abstraction has has 825 places, 2493 transitions, 82635 flow [2024-11-28 05:26:49,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:49,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:49,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:49,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:26:49,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:26:49,663 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:26:49,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash -851073012, now seen corresponding path program 17 times [2024-11-28 05:26:49,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321828621] [2024-11-28 05:26:49,664 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:49,671 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:49,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:49,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321828621] [2024-11-28 05:26:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321828621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942261118] [2024-11-28 05:26:49,997 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:50,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:50,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:26:50,061 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:50,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:50,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:26:50,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:50,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942261118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:51,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:26:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-11-28 05:26:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136088972] [2024-11-28 05:26:51,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:51,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:26:51,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:51,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:26:51,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:26:51,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:26:51,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 2493 transitions, 82635 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:51,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:51,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:26:51,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:05,256 INFO L124 PetriNetUnfolderBase]: 5298/9613 cut-off events. [2024-11-28 05:27:05,256 INFO L125 PetriNetUnfolderBase]: For 361735/361735 co-relation queries the response was YES. [2024-11-28 05:27:05,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125999 conditions, 9613 events. 5298/9613 cut-off events. For 361735/361735 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 72633 event pairs, 94 based on Foata normal form. 2/9615 useless extension candidates. Maximal degree in co-relation 125810. Up to 4865 conditions per place. [2024-11-28 05:27:05,506 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 782 selfloop transitions, 1933 changer transitions 14/2730 dead transitions. [2024-11-28 05:27:05,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 2730 transitions, 91740 flow [2024-11-28 05:27:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 05:27:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-28 05:27:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 444 transitions. [2024-11-28 05:27:05,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37092731829573933 [2024-11-28 05:27:05,508 INFO L175 Difference]: Start difference. First operand has 825 places, 2493 transitions, 82635 flow. Second operand 57 states and 444 transitions. [2024-11-28 05:27:05,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 2730 transitions, 91740 flow [2024-11-28 05:27:21,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 847 places, 2730 transitions, 90610 flow, removed 260 selfloop flow, removed 29 redundant places. [2024-11-28 05:27:21,545 INFO L231 Difference]: Finished difference. Result has 858 places, 2615 transitions, 90348 flow [2024-11-28 05:27:21,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=81628, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=90348, PETRI_PLACES=858, PETRI_TRANSITIONS=2615} [2024-11-28 05:27:21,547 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 835 predicate places. [2024-11-28 05:27:21,547 INFO L471 AbstractCegarLoop]: Abstraction has has 858 places, 2615 transitions, 90348 flow [2024-11-28 05:27:21,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:21,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:21,548 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:21,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:27:21,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:21,748 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:27:21,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1982501116, now seen corresponding path program 18 times [2024-11-28 05:27:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:27:21,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729117451] [2024-11-28 05:27:21,749 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:27:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:27:21,758 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:27:21,758 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:27:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729117451] [2024-11-28 05:27:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729117451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:27:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513035868] [2024-11-28 05:27:22,094 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:27:22,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:22,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:22,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:22,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:27:22,154 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:27:22,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:22,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:27:22,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:22,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513035868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:23,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:27:23,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:27:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413684806] [2024-11-28 05:27:23,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:23,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:27:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:27:23,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:27:23,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:27:23,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:27:23,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2615 transitions, 90348 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:23,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:23,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:27:23,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:41,250 INFO L124 PetriNetUnfolderBase]: 5395/9795 cut-off events. [2024-11-28 05:27:41,250 INFO L125 PetriNetUnfolderBase]: For 403599/403599 co-relation queries the response was YES. [2024-11-28 05:27:41,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134389 conditions, 9795 events. 5395/9795 cut-off events. For 403599/403599 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 74288 event pairs, 97 based on Foata normal form. 8/9803 useless extension candidates. Maximal degree in co-relation 134197. Up to 4606 conditions per place. [2024-11-28 05:27:41,496 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 1032 selfloop transitions, 1827 changer transitions 25/2885 dead transitions. [2024-11-28 05:27:41,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 2885 transitions, 100587 flow [2024-11-28 05:27:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-28 05:27:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2024-11-28 05:27:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 648 transitions. [2024-11-28 05:27:41,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-28 05:27:41,499 INFO L175 Difference]: Start difference. First operand has 858 places, 2615 transitions, 90348 flow. Second operand 80 states and 648 transitions. [2024-11-28 05:27:41,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 2885 transitions, 100587 flow [2024-11-28 05:27:58,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 2885 transitions, 99146 flow, removed 135 selfloop flow, removed 33 redundant places. [2024-11-28 05:27:58,681 INFO L231 Difference]: Finished difference. Result has 922 places, 2682 transitions, 97889 flow [2024-11-28 05:27:58,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=88947, PETRI_DIFFERENCE_MINUEND_PLACES=822, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1758, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=97889, PETRI_PLACES=922, PETRI_TRANSITIONS=2682} [2024-11-28 05:27:58,683 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 899 predicate places. [2024-11-28 05:27:58,683 INFO L471 AbstractCegarLoop]: Abstraction has has 922 places, 2682 transitions, 97889 flow [2024-11-28 05:27:58,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:58,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:58,683 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:58,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 05:27:58,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-28 05:27:58,884 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:27:58,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash 867270694, now seen corresponding path program 19 times [2024-11-28 05:27:58,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:27:58,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776159444] [2024-11-28 05:27:58,885 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:27:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:27:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:27:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:27:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776159444] [2024-11-28 05:27:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776159444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:27:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719698287] [2024-11-28 05:27:59,214 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:27:59,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:59,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:59,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:27:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:27:59,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:27:59,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:59,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:28:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:28:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719698287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:28:00,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:28:00,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:28:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026582360] [2024-11-28 05:28:00,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:28:00,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:28:00,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:28:00,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:28:00,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:28:00,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:28:00,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 2682 transitions, 97889 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:28:00,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:28:00,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:28:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:28:17,911 INFO L124 PetriNetUnfolderBase]: 5619/10141 cut-off events. [2024-11-28 05:28:17,912 INFO L125 PetriNetUnfolderBase]: For 485169/485169 co-relation queries the response was YES. [2024-11-28 05:28:18,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146260 conditions, 10141 events. 5619/10141 cut-off events. For 485169/485169 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 76735 event pairs, 103 based on Foata normal form. 2/10143 useless extension candidates. Maximal degree in co-relation 146051. Up to 4933 conditions per place. [2024-11-28 05:28:18,179 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 910 selfloop transitions, 2028 changer transitions 14/2953 dead transitions. [2024-11-28 05:28:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 2953 transitions, 108905 flow [2024-11-28 05:28:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-28 05:28:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-11-28 05:28:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 555 transitions. [2024-11-28 05:28:18,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3722334004024145 [2024-11-28 05:28:18,181 INFO L175 Difference]: Start difference. First operand has 922 places, 2682 transitions, 97889 flow. Second operand 71 states and 555 transitions. [2024-11-28 05:28:18,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 2953 transitions, 108905 flow [2024-11-28 05:28:39,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 947 places, 2953 transitions, 108211 flow, removed 152 selfloop flow, removed 41 redundant places. [2024-11-28 05:28:40,115 INFO L231 Difference]: Finished difference. Result has 958 places, 2808 transitions, 106635 flow [2024-11-28 05:28:40,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=97231, PETRI_DIFFERENCE_MINUEND_PLACES=877, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=106635, PETRI_PLACES=958, PETRI_TRANSITIONS=2808} [2024-11-28 05:28:40,118 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 935 predicate places. [2024-11-28 05:28:40,118 INFO L471 AbstractCegarLoop]: Abstraction has has 958 places, 2808 transitions, 106635 flow [2024-11-28 05:28:40,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:28:40,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:28:40,119 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:28:40,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:28:40,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:28:40,324 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:28:40,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:28:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1724813692, now seen corresponding path program 20 times [2024-11-28 05:28:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:28:40,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971229437] [2024-11-28 05:28:40,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:28:40,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:28:40,331 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:28:40,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:28:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:28:40,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:28:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971229437] [2024-11-28 05:28:40,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971229437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:28:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675412213] [2024-11-28 05:28:40,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:28:40,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:28:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:28:40,633 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:28:40,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:28:40,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:28:40,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:28:40,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:28:40,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:28:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:28:41,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:28:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:28:41,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675412213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:28:41,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:28:41,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:28:41,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497861085] [2024-11-28 05:28:41,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:28:41,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:28:41,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:28:41,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:28:41,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:28:41,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:28:41,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 2808 transitions, 106635 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:28:41,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:28:41,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:28:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:28:57,848 INFO L124 PetriNetUnfolderBase]: 5617/10127 cut-off events. [2024-11-28 05:28:57,849 INFO L125 PetriNetUnfolderBase]: For 522723/522723 co-relation queries the response was YES. [2024-11-28 05:28:58,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152856 conditions, 10127 events. 5617/10127 cut-off events. For 522723/522723 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 76445 event pairs, 116 based on Foata normal form. 2/10129 useless extension candidates. Maximal degree in co-relation 152642. Up to 6098 conditions per place. [2024-11-28 05:28:58,152 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1119 selfloop transitions, 1764 changer transitions 11/2895 dead transitions. [2024-11-28 05:28:58,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 992 places, 2895 transitions, 113276 flow [2024-11-28 05:28:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 05:28:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-28 05:28:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 315 transitions. [2024-11-28 05:28:58,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-11-28 05:28:58,153 INFO L175 Difference]: Start difference. First operand has 958 places, 2808 transitions, 106635 flow. Second operand 38 states and 315 transitions. [2024-11-28 05:28:58,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 992 places, 2895 transitions, 113276 flow [2024-11-28 05:29:20,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 956 places, 2895 transitions, 111201 flow, removed 164 selfloop flow, removed 36 redundant places. [2024-11-28 05:29:20,263 INFO L231 Difference]: Finished difference. Result has 960 places, 2811 transitions, 110257 flow [2024-11-28 05:29:20,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=104563, PETRI_DIFFERENCE_MINUEND_PLACES=919, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=110257, PETRI_PLACES=960, PETRI_TRANSITIONS=2811} [2024-11-28 05:29:20,266 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 937 predicate places. [2024-11-28 05:29:20,266 INFO L471 AbstractCegarLoop]: Abstraction has has 960 places, 2811 transitions, 110257 flow [2024-11-28 05:29:20,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:20,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:29:20,266 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:29:20,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:29:20,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:20,471 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:29:20,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2026504516, now seen corresponding path program 21 times [2024-11-28 05:29:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850739873] [2024-11-28 05:29:20,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:29:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:20,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:29:20,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:29:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850739873] [2024-11-28 05:29:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850739873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:29:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979690608] [2024-11-28 05:29:20,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:29:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:20,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:20,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15dfb0e0-3433-45a8-bc51-1c1ed3d659e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:29:20,790 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:29:20,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:20,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:29:20,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:29:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:29:21,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:29:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:29:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979690608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:29:21,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:29:21,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-28 05:29:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255403462] [2024-11-28 05:29:21,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:29:21,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:29:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:21,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:29:21,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:29:21,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 05:29:21,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 2811 transitions, 110257 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:21,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:29:21,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 05:29:21,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand