./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/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_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/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_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:03:52,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:03:52,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:03:52,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:03:52,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:03:52,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:03:52,370 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:03:52,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:03:52,371 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:03:52,371 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:03:52,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:03:52,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:03:52,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:03:52,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:03:52,374 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:03:52,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:03:52,374 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:03:52,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:03:52,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:03:52,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:03:52,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:03:52,376 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:03:52,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:03:52,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:03:52,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:03:52,377 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:03:52,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:03:52,379 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_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/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 -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-28 03:03:52,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:03:52,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:03:52,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:03:52,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:03:52,704 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:03:52,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/clever.wvr.c [2024-11-28 03:03:55,698 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/data/acb132b77/32205d51a8b24ef396ab10195e2293bd/FLAG1411c573e [2024-11-28 03:03:56,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:03:56,028 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-28 03:03:56,052 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/data/acb132b77/32205d51a8b24ef396ab10195e2293bd/FLAG1411c573e [2024-11-28 03:03:56,086 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/data/acb132b77/32205d51a8b24ef396ab10195e2293bd [2024-11-28 03:03:56,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:03:56,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:03:56,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:03:56,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:03:56,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:03:56,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca9d1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56, skipping insertion in model container [2024-11-28 03:03:56,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,132 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:03:56,361 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_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-28 03:03:56,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:03:56,382 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:03:56,415 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_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-28 03:03:56,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:03:56,440 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:03:56,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56 WrapperNode [2024-11-28 03:03:56,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:03:56,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:03:56,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:03:56,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:03:56,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,488 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-28 03:03:56,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:03:56,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:03:56,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:03:56,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:03:56,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,526 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 03:03:56,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,530 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:03:56,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:03:56,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:03:56,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:03:56,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (1/1) ... [2024-11-28 03:03:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:03:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:56,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:03:56,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:03:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:03:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:03:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:03:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:03:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:03:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:03:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:03:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:03:56,615 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:03:56,724 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:03:56,726 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:03:56,945 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:03:56,946 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:03:57,180 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:03:57,180 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:03:57,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:57 BoogieIcfgContainer [2024-11-28 03:03:57,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:03:57,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:03:57,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:03:57,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:03:57,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:03:56" (1/3) ... [2024-11-28 03:03:57,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e59e5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:57, skipping insertion in model container [2024-11-28 03:03:57,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:56" (2/3) ... [2024-11-28 03:03:57,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e59e5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:57, skipping insertion in model container [2024-11-28 03:03:57,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:57" (3/3) ... [2024-11-28 03:03:57,192 INFO L128 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-28 03:03:57,213 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:03:57,215 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG clever.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 03:03:57,215 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:03:57,273 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:03:57,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 03:03:57,349 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-28 03:03:57,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:03:57,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-11-28 03:03:57,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 03:03:57,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-28 03:03:57,395 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:03:57,414 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;@6ea96aca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:03:57,415 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 03:03:57,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:03:57,432 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-28 03:03:57,432 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:03:57,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:57,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:57,434 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:57,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-11-28 03:03:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265710083] [2024-11-28 03:03:57,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:57,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:57,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265710083] [2024-11-28 03:03:57,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265710083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:58,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:58,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:03:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893964595] [2024-11-28 03:03:58,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:58,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:03:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:58,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:03:58,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:03:58,051 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:03:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:58,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:03:58,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:58,215 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-11-28 03:03:58,216 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-28 03:03:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 512 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-11-28 03:03:58,219 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-28 03:03:58,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-11-28 03:03:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:03:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:03:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-28 03:03:58,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-28 03:03:58,240 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-11-28 03:03:58,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-11-28 03:03:58,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:03:58,255 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-28 03:03:58,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-28 03:03:58,264 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-28 03:03:58,264 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-28 03:03:58,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:58,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:58,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:58,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:03:58,265 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:58,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-11-28 03:03:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451514847] [2024-11-28 03:03:58,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:58,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451514847] [2024-11-28 03:03:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451514847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:03:58,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:03:58,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:03:58,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232828153] [2024-11-28 03:03:58,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:03:58,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:03:58,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:58,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:03:58,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:03:58,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:03:58,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:58,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:58,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:03:58,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:58,647 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-11-28 03:03:58,647 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-11-28 03:03:58,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 807 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-11-28 03:03:58,653 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-11-28 03:03:58,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-11-28 03:03:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:03:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:03:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-28 03:03:58,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-28 03:03:58,655 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-11-28 03:03:58,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-11-28 03:03:58,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:03:58,657 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-11-28 03:03:58,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-28 03:03:58,658 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-28 03:03:58,659 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-11-28 03:03:58,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:58,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:58,659 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:58,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:03:58,659 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:58,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-11-28 03:03:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:58,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801849429] [2024-11-28 03:03:58,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:58,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:58,685 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:58,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801849429] [2024-11-28 03:03:58,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801849429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:58,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526981438] [2024-11-28 03:03:58,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:58,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:58,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:58,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:03:58,925 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:58,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:58,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:03:58,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:59,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526981438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:59,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:59,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-28 03:03:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505138544] [2024-11-28 03:03:59,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:59,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:03:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:59,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:03:59,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:03:59,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:03:59,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:59,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:59,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:03:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:59,399 INFO L124 PetriNetUnfolderBase]: 145/239 cut-off events. [2024-11-28 03:03:59,399 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-28 03:03:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 239 events. 145/239 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 774 event pairs, 15 based on Foata normal form. 8/244 useless extension candidates. Maximal degree in co-relation 306. Up to 105 conditions per place. [2024-11-28 03:03:59,403 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 35 selfloop transitions, 15 changer transitions 5/58 dead transitions. [2024-11-28 03:03:59,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 348 flow [2024-11-28 03:03:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:03:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:03:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-11-28 03:03:59,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 03:03:59,406 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 7 states and 80 transitions. [2024-11-28 03:03:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 348 flow [2024-11-28 03:03:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 58 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:03:59,411 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 211 flow [2024-11-28 03:03:59,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2024-11-28 03:03:59,414 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2024-11-28 03:03:59,415 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 211 flow [2024-11-28 03:03:59,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:59,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:59,415 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:59,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:59,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:59,616 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:03:59,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-11-28 03:03:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:59,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778976202] [2024-11-28 03:03:59,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:59,780 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 03:03:59,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:59,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778976202] [2024-11-28 03:03:59,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778976202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:59,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404682480] [2024-11-28 03:03:59,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:03:59,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:59,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:59,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:59,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:03:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:59,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:03:59,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:00,014 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 03:04:00,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:00,071 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 03:04:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404682480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:00,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-28 03:04:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515590002] [2024-11-28 03:04:00,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:00,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:04:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:00,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:04:00,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:04:00,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:00,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:00,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:00,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:00,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:00,275 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-11-28 03:04:00,275 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-11-28 03:04:00,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 223 events. 127/223 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 2 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 543. Up to 91 conditions per place. [2024-11-28 03:04:00,282 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-11-28 03:04:00,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 423 flow [2024-11-28 03:04:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:04:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:04:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-28 03:04:00,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-28 03:04:00,285 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 211 flow. Second operand 5 states and 64 transitions. [2024-11-28 03:04:00,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 423 flow [2024-11-28 03:04:00,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 411 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-28 03:04:00,298 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 237 flow [2024-11-28 03:04:00,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-11-28 03:04:00,299 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-28 03:04:00,299 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 237 flow [2024-11-28 03:04:00,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:00,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:00,300 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:00,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:00,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:00,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:00,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1647003766, now seen corresponding path program 1 times [2024-11-28 03:04:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662742932] [2024-11-28 03:04:00,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:04:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:01,057 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 03:04:01,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662742932] [2024-11-28 03:04:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662742932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011959865] [2024-11-28 03:04:01,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:04:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:01,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:04:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:01,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:04:01,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:01,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011959865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:01,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 03:04:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865106298] [2024-11-28 03:04:01,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:01,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:04:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:01,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:04:01,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:04:01,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:01,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 237 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:01,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:01,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:01,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:02,194 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-28 03:04:02,194 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-11-28 03:04:02,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 435 events. 249/435 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1677 event pairs, 10 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1015. Up to 176 conditions per place. [2024-11-28 03:04:02,201 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2024-11-28 03:04:02,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 105 transitions, 873 flow [2024-11-28 03:04:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:04:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:04:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-11-28 03:04:02,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-28 03:04:02,205 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 237 flow. Second operand 9 states and 119 transitions. [2024-11-28 03:04:02,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 105 transitions, 873 flow [2024-11-28 03:04:02,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 841 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 03:04:02,218 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 409 flow [2024-11-28 03:04:02,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-28 03:04:02,221 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-28 03:04:02,221 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 409 flow [2024-11-28 03:04:02,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:02,222 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:02,222 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:02,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:02,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:02,427 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:02,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-11-28 03:04:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521474325] [2024-11-28 03:04:02,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:02,450 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:02,450 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521474325] [2024-11-28 03:04:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521474325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:04:02,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:04:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:04:02,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122848641] [2024-11-28 03:04:02,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:04:02,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:04:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:02,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:04:02,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:04:02,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:02,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 409 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 03:04:02,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:02,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:02,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:02,614 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2024-11-28 03:04:02,614 INFO L125 PetriNetUnfolderBase]: For 1044/1050 co-relation queries the response was YES. [2024-11-28 03:04:02,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 331 events. 192/331 cut-off events. For 1044/1050 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1133 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1490. Up to 152 conditions per place. [2024-11-28 03:04:02,618 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2024-11-28 03:04:02,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 696 flow [2024-11-28 03:04:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:04:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:04:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-28 03:04:02,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-28 03:04:02,619 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 409 flow. Second operand 5 states and 59 transitions. [2024-11-28 03:04:02,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 696 flow [2024-11-28 03:04:02,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 639 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-28 03:04:02,627 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 453 flow [2024-11-28 03:04:02,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-28 03:04:02,628 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-28 03:04:02,628 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 453 flow [2024-11-28 03:04:02,628 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 03:04:02,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:02,631 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:02,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:04:02,632 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:02,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-11-28 03:04:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597383524] [2024-11-28 03:04:02,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:02,662 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:02,663 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:03,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597383524] [2024-11-28 03:04:03,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597383524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:03,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860427719] [2024-11-28 03:04:03,022 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:03,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:03,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:03,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:04:03,086 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:03,086 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:03,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:04:03,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:03,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860427719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:03,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:03,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 03:04:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112894732] [2024-11-28 03:04:03,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:03,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:04:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:03,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:04:03,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:04:03,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:03,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 453 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:03,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:03,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:03,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:04,462 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2024-11-28 03:04:04,462 INFO L125 PetriNetUnfolderBase]: For 4363/4363 co-relation queries the response was YES. [2024-11-28 03:04:04,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 1068 events. 624/1068 cut-off events. For 4363/4363 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5014 event pairs, 47 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4328. Up to 321 conditions per place. [2024-11-28 03:04:04,474 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2024-11-28 03:04:04,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2363 flow [2024-11-28 03:04:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:04:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 03:04:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-11-28 03:04:04,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2024-11-28 03:04:04,477 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 453 flow. Second operand 17 states and 223 transitions. [2024-11-28 03:04:04,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2363 flow [2024-11-28 03:04:04,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2260 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-28 03:04:04,500 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1585 flow [2024-11-28 03:04:04,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2024-11-28 03:04:04,501 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-11-28 03:04:04,501 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1585 flow [2024-11-28 03:04:04,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:04,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:04,502 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:04,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:04:04,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:04,707 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:04,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1101021392, now seen corresponding path program 3 times [2024-11-28 03:04:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148658804] [2024-11-28 03:04:04,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:04,723 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:04,723 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:05,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:05,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148658804] [2024-11-28 03:04:05,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148658804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:05,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418862087] [2024-11-28 03:04:05,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:05,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:05,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:05,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:04:05,157 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:05,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:05,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:04:05,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:05,428 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 03:04:05,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:05,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418862087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:05,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:05,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 03:04:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925570143] [2024-11-28 03:04:05,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:05,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:04:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:05,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:04:05,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:04:05,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:05,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1585 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:05,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:05,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:05,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:06,721 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2024-11-28 03:04:06,722 INFO L125 PetriNetUnfolderBase]: For 11536/11536 co-relation queries the response was YES. [2024-11-28 03:04:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12458 conditions, 2300 events. 1342/2300 cut-off events. For 11536/11536 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12716 event pairs, 116 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11372. Up to 713 conditions per place. [2024-11-28 03:04:06,747 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2024-11-28 03:04:06,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4525 flow [2024-11-28 03:04:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:04:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:04:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-11-28 03:04:06,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-11-28 03:04:06,750 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1585 flow. Second operand 11 states and 144 transitions. [2024-11-28 03:04:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4525 flow [2024-11-28 03:04:06,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4231 flow, removed 144 selfloop flow, removed 2 redundant places. [2024-11-28 03:04:06,803 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3341 flow [2024-11-28 03:04:06,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3341, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2024-11-28 03:04:06,804 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-28 03:04:06,804 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3341 flow [2024-11-28 03:04:06,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:06,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:06,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:06,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:07,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:07,006 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:07,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash -517310532, now seen corresponding path program 1 times [2024-11-28 03:04:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797924539] [2024-11-28 03:04:07,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:04:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797924539] [2024-11-28 03:04:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797924539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407533899] [2024-11-28 03:04:07,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:04:07,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:07,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:07,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:04:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:07,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:04:07,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:08,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:08,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407533899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:08,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:08,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-28 03:04:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495577888] [2024-11-28 03:04:08,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:08,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:04:08,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:08,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:04:08,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:04:08,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:08,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3341 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:08,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:08,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:08,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:11,028 INFO L124 PetriNetUnfolderBase]: 2108/3606 cut-off events. [2024-11-28 03:04:11,029 INFO L125 PetriNetUnfolderBase]: For 24407/24407 co-relation queries the response was YES. [2024-11-28 03:04:11,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21461 conditions, 3606 events. 2108/3606 cut-off events. For 24407/24407 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20518 event pairs, 172 based on Foata normal form. 16/3621 useless extension candidates. Maximal degree in co-relation 20767. Up to 2101 conditions per place. [2024-11-28 03:04:11,080 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 316 selfloop transitions, 162 changer transitions 6/487 dead transitions. [2024-11-28 03:04:11,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 487 transitions, 7191 flow [2024-11-28 03:04:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:04:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:04:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2024-11-28 03:04:11,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-28 03:04:11,082 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3341 flow. Second operand 16 states and 208 transitions. [2024-11-28 03:04:11,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 487 transitions, 7191 flow [2024-11-28 03:04:11,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 487 transitions, 7048 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-11-28 03:04:11,245 INFO L231 Difference]: Finished difference. Result has 110 places, 363 transitions, 5745 flow [2024-11-28 03:04:11,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5745, PETRI_PLACES=110, PETRI_TRANSITIONS=363} [2024-11-28 03:04:11,249 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 89 predicate places. [2024-11-28 03:04:11,250 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 363 transitions, 5745 flow [2024-11-28 03:04:11,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:11,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:11,250 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:11,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:11,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:11,455 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:11,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 4438554, now seen corresponding path program 2 times [2024-11-28 03:04:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:11,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951868461] [2024-11-28 03:04:11,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:11,486 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:11,486 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951868461] [2024-11-28 03:04:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951868461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787890482] [2024-11-28 03:04:11,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:11,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:11,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:04:12,038 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:12,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:12,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:04:12,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:12,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:12,951 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 03:04:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787890482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:12,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-28 03:04:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631507891] [2024-11-28 03:04:12,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:12,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:04:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:12,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:04:12,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:04:12,954 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:12,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 363 transitions, 5745 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:12,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:12,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:20,384 INFO L124 PetriNetUnfolderBase]: 2694/4648 cut-off events. [2024-11-28 03:04:20,384 INFO L125 PetriNetUnfolderBase]: For 41285/41285 co-relation queries the response was YES. [2024-11-28 03:04:20,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29962 conditions, 4648 events. 2694/4648 cut-off events. For 41285/41285 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28408 event pairs, 265 based on Foata normal form. 25/4672 useless extension candidates. Maximal degree in co-relation 29243. Up to 3433 conditions per place. [2024-11-28 03:04:20,455 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 437 selfloop transitions, 171 changer transitions 7/618 dead transitions. [2024-11-28 03:04:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 618 transitions, 10185 flow [2024-11-28 03:04:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:04:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:04:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 302 transitions. [2024-11-28 03:04:20,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-11-28 03:04:20,458 INFO L175 Difference]: Start difference. First operand has 110 places, 363 transitions, 5745 flow. Second operand 24 states and 302 transitions. [2024-11-28 03:04:20,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 618 transitions, 10185 flow [2024-11-28 03:04:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 618 transitions, 9806 flow, removed 176 selfloop flow, removed 5 redundant places. [2024-11-28 03:04:20,652 INFO L231 Difference]: Finished difference. Result has 139 places, 497 transitions, 8502 flow [2024-11-28 03:04:20,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8502, PETRI_PLACES=139, PETRI_TRANSITIONS=497} [2024-11-28 03:04:20,653 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2024-11-28 03:04:20,653 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 497 transitions, 8502 flow [2024-11-28 03:04:20,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:20,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:20,653 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:20,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:04:20,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:20,858 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:20,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash -609261155, now seen corresponding path program 3 times [2024-11-28 03:04:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075384605] [2024-11-28 03:04:20,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:20,869 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:20,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075384605] [2024-11-28 03:04:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075384605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485208470] [2024-11-28 03:04:20,940 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:20,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:20,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:20,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:04:20,998 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:20,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:20,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:04:21,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:21,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:21,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485208470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:21,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:21,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 03:04:21,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077171165] [2024-11-28 03:04:21,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:21,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:04:21,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:21,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:04:21,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:04:21,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:21,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 497 transitions, 8502 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:21,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:21,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:21,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:22,991 INFO L124 PetriNetUnfolderBase]: 3743/6638 cut-off events. [2024-11-28 03:04:22,991 INFO L125 PetriNetUnfolderBase]: For 69743/69746 co-relation queries the response was YES. [2024-11-28 03:04:23,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43594 conditions, 6638 events. 3743/6638 cut-off events. For 69743/69746 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 45864 event pairs, 56 based on Foata normal form. 63/6699 useless extension candidates. Maximal degree in co-relation 41930. Up to 2010 conditions per place. [2024-11-28 03:04:23,064 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 665 selfloop transitions, 250 changer transitions 13/931 dead transitions. [2024-11-28 03:04:23,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 931 transitions, 16610 flow [2024-11-28 03:04:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:04:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:04:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-11-28 03:04:23,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-28 03:04:23,066 INFO L175 Difference]: Start difference. First operand has 139 places, 497 transitions, 8502 flow. Second operand 12 states and 141 transitions. [2024-11-28 03:04:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 931 transitions, 16610 flow [2024-11-28 03:04:23,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 931 transitions, 15762 flow, removed 401 selfloop flow, removed 9 redundant places. [2024-11-28 03:04:23,460 INFO L231 Difference]: Finished difference. Result has 149 places, 632 transitions, 11371 flow [2024-11-28 03:04:23,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11371, PETRI_PLACES=149, PETRI_TRANSITIONS=632} [2024-11-28 03:04:23,462 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2024-11-28 03:04:23,462 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 632 transitions, 11371 flow [2024-11-28 03:04:23,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:23,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:23,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:23,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:04:23,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:23,664 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:23,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1254839213, now seen corresponding path program 4 times [2024-11-28 03:04:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:23,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764492690] [2024-11-28 03:04:23,665 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:23,686 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:23,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:23,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764492690] [2024-11-28 03:04:23,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764492690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:23,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566475676] [2024-11-28 03:04:23,749 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:04:23,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:23,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:23,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:04:23,808 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:04:23,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:23,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:04:23,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:23,923 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 03:04:23,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566475676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:23,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-28 03:04:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003458272] [2024-11-28 03:04:23,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:23,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:04:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:23,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:04:23,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:04:23,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:23,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 632 transitions, 11371 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:23,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:23,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:23,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:26,274 INFO L124 PetriNetUnfolderBase]: 4210/7780 cut-off events. [2024-11-28 03:04:26,274 INFO L125 PetriNetUnfolderBase]: For 101113/101113 co-relation queries the response was YES. [2024-11-28 03:04:26,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55936 conditions, 7780 events. 4210/7780 cut-off events. For 101113/101113 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 57957 event pairs, 365 based on Foata normal form. 32/7811 useless extension candidates. Maximal degree in co-relation 55362. Up to 3069 conditions per place. [2024-11-28 03:04:26,375 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 525 selfloop transitions, 477 changer transitions 5/1010 dead transitions. [2024-11-28 03:04:26,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1010 transitions, 19555 flow [2024-11-28 03:04:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:04:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:04:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-11-28 03:04:26,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-11-28 03:04:26,377 INFO L175 Difference]: Start difference. First operand has 149 places, 632 transitions, 11371 flow. Second operand 14 states and 159 transitions. [2024-11-28 03:04:26,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1010 transitions, 19555 flow [2024-11-28 03:04:27,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1010 transitions, 18950 flow, removed 298 selfloop flow, removed 2 redundant places. [2024-11-28 03:04:27,185 INFO L231 Difference]: Finished difference. Result has 164 places, 769 transitions, 14981 flow [2024-11-28 03:04:27,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10834, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14981, PETRI_PLACES=164, PETRI_TRANSITIONS=769} [2024-11-28 03:04:27,187 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2024-11-28 03:04:27,187 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 769 transitions, 14981 flow [2024-11-28 03:04:27,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:27,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:27,187 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:27,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:04:27,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:04:27,388 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:27,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash -853422420, now seen corresponding path program 5 times [2024-11-28 03:04:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:27,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090422708] [2024-11-28 03:04:27,389 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:04:27,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:27,404 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:27,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090422708] [2024-11-28 03:04:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090422708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19111601] [2024-11-28 03:04:27,806 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:04:27,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:27,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:27,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:27,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:04:27,889 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:27,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:27,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:04:27,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:28,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:28,630 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 03:04:28,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19111601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:28,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:28,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-11-28 03:04:28,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055027296] [2024-11-28 03:04:28,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:28,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:04:28,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:28,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:04:28,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:04:28,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:28,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 769 transitions, 14981 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 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 03:04:28,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:28,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:28,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:32,982 INFO L124 PetriNetUnfolderBase]: 5211/9666 cut-off events. [2024-11-28 03:04:32,982 INFO L125 PetriNetUnfolderBase]: For 153936/153936 co-relation queries the response was YES. [2024-11-28 03:04:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74341 conditions, 9666 events. 5211/9666 cut-off events. For 153936/153936 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 74171 event pairs, 446 based on Foata normal form. 19/9684 useless extension candidates. Maximal degree in co-relation 71736. Up to 4642 conditions per place. [2024-11-28 03:04:33,092 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 477 selfloop transitions, 689 changer transitions 15/1184 dead transitions. [2024-11-28 03:04:33,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 1184 transitions, 24908 flow [2024-11-28 03:04:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:04:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:04:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 276 transitions. [2024-11-28 03:04:33,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 03:04:33,094 INFO L175 Difference]: Start difference. First operand has 164 places, 769 transitions, 14981 flow. Second operand 23 states and 276 transitions. [2024-11-28 03:04:33,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 1184 transitions, 24908 flow [2024-11-28 03:04:34,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1184 transitions, 24607 flow, removed 139 selfloop flow, removed 3 redundant places. [2024-11-28 03:04:34,755 INFO L231 Difference]: Finished difference. Result has 195 places, 1066 transitions, 24187 flow [2024-11-28 03:04:34,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14778, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24187, PETRI_PLACES=195, PETRI_TRANSITIONS=1066} [2024-11-28 03:04:34,757 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2024-11-28 03:04:34,757 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 1066 transitions, 24187 flow [2024-11-28 03:04:34,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 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 03:04:34,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:34,758 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:34,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:04:34,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:04:34,958 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:34,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash -140309619, now seen corresponding path program 6 times [2024-11-28 03:04:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:34,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813698170] [2024-11-28 03:04:34,959 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:34,969 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:04:34,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813698170] [2024-11-28 03:04:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813698170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:35,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727918666] [2024-11-28 03:04:35,034 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:04:35,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:35,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:35,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:04:35,089 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:04:35,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:35,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:04:35,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:35,212 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 03:04:35,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727918666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:35,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 03:04:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265766655] [2024-11-28 03:04:35,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:35,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:04:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:35,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:04:35,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:04:35,267 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:35,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 1066 transitions, 24187 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:35,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:35,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:35,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:40,621 INFO L124 PetriNetUnfolderBase]: 6088/11140 cut-off events. [2024-11-28 03:04:40,622 INFO L125 PetriNetUnfolderBase]: For 210196/210196 co-relation queries the response was YES. [2024-11-28 03:04:40,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93832 conditions, 11140 events. 6088/11140 cut-off events. For 210196/210196 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 86888 event pairs, 463 based on Foata normal form. 146/11285 useless extension candidates. Maximal degree in co-relation 92612. Up to 4576 conditions per place. [2024-11-28 03:04:40,774 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 803 selfloop transitions, 761 changer transitions 0/1567 dead transitions. [2024-11-28 03:04:40,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1567 transitions, 36791 flow [2024-11-28 03:04:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:04:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:04:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-11-28 03:04:40,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-28 03:04:40,776 INFO L175 Difference]: Start difference. First operand has 195 places, 1066 transitions, 24187 flow. Second operand 14 states and 163 transitions. [2024-11-28 03:04:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1567 transitions, 36791 flow [2024-11-28 03:04:42,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1567 transitions, 35215 flow, removed 777 selfloop flow, removed 6 redundant places. [2024-11-28 03:04:42,918 INFO L231 Difference]: Finished difference. Result has 210 places, 1259 transitions, 30605 flow [2024-11-28 03:04:42,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22885, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30605, PETRI_PLACES=210, PETRI_TRANSITIONS=1259} [2024-11-28 03:04:42,919 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2024-11-28 03:04:42,919 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 1259 transitions, 30605 flow [2024-11-28 03:04:42,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:42,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:42,919 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:42,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:04:43,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:04:43,120 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:43,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash 759064235, now seen corresponding path program 7 times [2024-11-28 03:04:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:43,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344670804] [2024-11-28 03:04:43,120 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:04:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:04:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:04:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344670804] [2024-11-28 03:04:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344670804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:04:43,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:04:43,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:04:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711367994] [2024-11-28 03:04:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:04:43,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:04:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:43,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:04:43,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:04:43,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:43,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 1259 transitions, 30605 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:43,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:43,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:43,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:49,216 INFO L124 PetriNetUnfolderBase]: 6079/11169 cut-off events. [2024-11-28 03:04:49,216 INFO L125 PetriNetUnfolderBase]: For 269021/269024 co-relation queries the response was YES. [2024-11-28 03:04:49,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102671 conditions, 11169 events. 6079/11169 cut-off events. For 269021/269024 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 87685 event pairs, 135 based on Foata normal form. 63/11230 useless extension candidates. Maximal degree in co-relation 101201. Up to 3356 conditions per place. [2024-11-28 03:04:49,355 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1015 selfloop transitions, 515 changer transitions 0/1533 dead transitions. [2024-11-28 03:04:49,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1533 transitions, 37130 flow [2024-11-28 03:04:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:04:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:04:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-11-28 03:04:49,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 03:04:49,356 INFO L175 Difference]: Start difference. First operand has 210 places, 1259 transitions, 30605 flow. Second operand 7 states and 84 transitions. [2024-11-28 03:04:49,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1533 transitions, 37130 flow [2024-11-28 03:04:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1533 transitions, 36874 flow, removed 125 selfloop flow, removed 2 redundant places. [2024-11-28 03:04:52,085 INFO L231 Difference]: Finished difference. Result has 218 places, 1260 transitions, 32170 flow [2024-11-28 03:04:52,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29828, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=32170, PETRI_PLACES=218, PETRI_TRANSITIONS=1260} [2024-11-28 03:04:52,086 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2024-11-28 03:04:52,086 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 1260 transitions, 32170 flow [2024-11-28 03:04:52,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:52,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:52,086 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:52,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:04:52,086 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:04:52,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 953661444, now seen corresponding path program 8 times [2024-11-28 03:04:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:52,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543187445] [2024-11-28 03:04:52,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:52,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:52,103 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:52,103 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543187445] [2024-11-28 03:04:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543187445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153254276] [2024-11-28 03:04:52,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:04:52,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:52,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:52,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:04:52,574 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:04:52,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:52,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:04:52,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:53,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153254276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:04:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:04:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-28 03:04:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679391469] [2024-11-28 03:04:53,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:04:53,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:04:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:04:53,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:04:53,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:04:53,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:04:53,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1260 transitions, 32170 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:04:53,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:04:53,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:04:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:02,053 INFO L124 PetriNetUnfolderBase]: 7219/13208 cut-off events. [2024-11-28 03:05:02,053 INFO L125 PetriNetUnfolderBase]: For 357149/357152 co-relation queries the response was YES. [2024-11-28 03:05:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129367 conditions, 13208 events. 7219/13208 cut-off events. For 357149/357152 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 106584 event pairs, 593 based on Foata normal form. 11/13217 useless extension candidates. Maximal degree in co-relation 127819. Up to 6528 conditions per place. [2024-11-28 03:05:02,207 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 585 selfloop transitions, 1113 changer transitions 20/1721 dead transitions. [2024-11-28 03:05:02,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1721 transitions, 47479 flow [2024-11-28 03:05:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:05:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:05:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 262 transitions. [2024-11-28 03:05:02,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-11-28 03:05:02,209 INFO L175 Difference]: Start difference. First operand has 218 places, 1260 transitions, 32170 flow. Second operand 23 states and 262 transitions. [2024-11-28 03:05:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1721 transitions, 47479 flow [2024-11-28 03:05:05,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1721 transitions, 47011 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-28 03:05:05,985 INFO L231 Difference]: Finished difference. Result has 245 places, 1603 transitions, 45438 flow [2024-11-28 03:05:05,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31849, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=45438, PETRI_PLACES=245, PETRI_TRANSITIONS=1603} [2024-11-28 03:05:05,986 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2024-11-28 03:05:05,986 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 1603 transitions, 45438 flow [2024-11-28 03:05:05,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:05,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:05,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:05,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:05:06,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:05:06,187 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:06,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1449496398, now seen corresponding path program 9 times [2024-11-28 03:05:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:06,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120564925] [2024-11-28 03:05:06,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:06,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:06,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120564925] [2024-11-28 03:05:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120564925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254381815] [2024-11-28 03:05:06,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:06,248 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:05:06,304 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:05:06,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:06,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:05:06,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:06,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:06,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254381815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:06,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:06,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-28 03:05:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28362847] [2024-11-28 03:05:06,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:06,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:05:06,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:06,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:05:06,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:05:06,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:06,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 1603 transitions, 45438 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:06,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:06,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:06,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:11,649 INFO L124 PetriNetUnfolderBase]: 5042/9151 cut-off events. [2024-11-28 03:05:11,649 INFO L125 PetriNetUnfolderBase]: For 289340/289340 co-relation queries the response was YES. [2024-11-28 03:05:11,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92551 conditions, 9151 events. 5042/9151 cut-off events. For 289340/289340 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 71295 event pairs, 312 based on Foata normal form. 534/9684 useless extension candidates. Maximal degree in co-relation 92189. Up to 5095 conditions per place. [2024-11-28 03:05:11,746 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 969 selfloop transitions, 325 changer transitions 0/1297 dead transitions. [2024-11-28 03:05:11,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1297 transitions, 38946 flow [2024-11-28 03:05:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:05:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:05:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-28 03:05:11,747 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-28 03:05:11,747 INFO L175 Difference]: Start difference. First operand has 245 places, 1603 transitions, 45438 flow. Second operand 5 states and 64 transitions. [2024-11-28 03:05:11,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1297 transitions, 38946 flow [2024-11-28 03:05:14,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1297 transitions, 36092 flow, removed 1390 selfloop flow, removed 10 redundant places. [2024-11-28 03:05:14,409 INFO L231 Difference]: Finished difference. Result has 240 places, 1136 transitions, 31012 flow [2024-11-28 03:05:14,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26543, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=31012, PETRI_PLACES=240, PETRI_TRANSITIONS=1136} [2024-11-28 03:05:14,410 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2024-11-28 03:05:14,410 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 1136 transitions, 31012 flow [2024-11-28 03:05:14,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:14,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:14,411 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:14,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:14,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:05:14,611 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:14,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -539858419, now seen corresponding path program 10 times [2024-11-28 03:05:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:14,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831292131] [2024-11-28 03:05:14,612 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:14,623 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:14,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:14,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831292131] [2024-11-28 03:05:14,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831292131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:14,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098651030] [2024-11-28 03:05:14,704 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:14,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:14,707 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:14,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:05:14,765 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:14,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:14,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:05:14,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:14,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:14,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098651030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:14,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:14,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 03:05:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170943353] [2024-11-28 03:05:14,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:14,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:05:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:14,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:05:14,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:05:14,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:14,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 1136 transitions, 31012 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:14,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:14,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:14,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:20,258 INFO L124 PetriNetUnfolderBase]: 5158/9383 cut-off events. [2024-11-28 03:05:20,258 INFO L125 PetriNetUnfolderBase]: For 276392/276392 co-relation queries the response was YES. [2024-11-28 03:05:20,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93775 conditions, 9383 events. 5158/9383 cut-off events. For 276392/276392 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 73358 event pairs, 446 based on Foata normal form. 103/9485 useless extension candidates. Maximal degree in co-relation 90867. Up to 8671 conditions per place. [2024-11-28 03:05:20,350 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1141 selfloop transitions, 95 changer transitions 0/1239 dead transitions. [2024-11-28 03:05:20,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1239 transitions, 35738 flow [2024-11-28 03:05:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:05:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 03:05:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-11-28 03:05:20,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-28 03:05:20,352 INFO L175 Difference]: Start difference. First operand has 240 places, 1136 transitions, 31012 flow. Second operand 13 states and 158 transitions. [2024-11-28 03:05:20,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1239 transitions, 35738 flow [2024-11-28 03:05:22,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1239 transitions, 35572 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-11-28 03:05:22,682 INFO L231 Difference]: Finished difference. Result has 258 places, 1171 transitions, 32401 flow [2024-11-28 03:05:22,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30693, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=32401, PETRI_PLACES=258, PETRI_TRANSITIONS=1171} [2024-11-28 03:05:22,683 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-11-28 03:05:22,683 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 1171 transitions, 32401 flow [2024-11-28 03:05:22,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:22,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:22,683 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:22,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:05:22,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:05:22,884 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:22,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1967830377, now seen corresponding path program 11 times [2024-11-28 03:05:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:22,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128024458] [2024-11-28 03:05:22,884 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:22,891 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:22,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:05:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128024458] [2024-11-28 03:05:22,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128024458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686382401] [2024-11-28 03:05:22,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:22,940 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:22,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:05:22,991 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:05:22,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:22,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:05:22,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:23,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:05:23,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686382401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:23,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:23,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-28 03:05:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084187259] [2024-11-28 03:05:23,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:23,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:05:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:23,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:05:23,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:05:23,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1171 transitions, 32401 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:27,696 INFO L124 PetriNetUnfolderBase]: 5138/9320 cut-off events. [2024-11-28 03:05:27,696 INFO L125 PetriNetUnfolderBase]: For 314607/314610 co-relation queries the response was YES. [2024-11-28 03:05:27,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97778 conditions, 9320 events. 5138/9320 cut-off events. For 314607/314610 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 73025 event pairs, 179 based on Foata normal form. 12/9330 useless extension candidates. Maximal degree in co-relation 94909. Up to 6260 conditions per place. [2024-11-28 03:05:27,814 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1109 selfloop transitions, 136 changer transitions 7/1255 dead transitions. [2024-11-28 03:05:27,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1255 transitions, 36248 flow [2024-11-28 03:05:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:05:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:05:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-11-28 03:05:27,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-11-28 03:05:27,816 INFO L175 Difference]: Start difference. First operand has 258 places, 1171 transitions, 32401 flow. Second operand 15 states and 159 transitions. [2024-11-28 03:05:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1255 transitions, 36248 flow [2024-11-28 03:05:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 1255 transitions, 35592 flow, removed 289 selfloop flow, removed 5 redundant places. [2024-11-28 03:05:31,127 INFO L231 Difference]: Finished difference. Result has 270 places, 1176 transitions, 32080 flow [2024-11-28 03:05:31,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31295, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32080, PETRI_PLACES=270, PETRI_TRANSITIONS=1176} [2024-11-28 03:05:31,128 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2024-11-28 03:05:31,128 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 1176 transitions, 32080 flow [2024-11-28 03:05:31,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:31,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:31,128 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:31,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:31,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:31,328 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:31,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1615564561, now seen corresponding path program 12 times [2024-11-28 03:05:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304881980] [2024-11-28 03:05:31,329 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:31,337 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:05:31,337 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:31,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304881980] [2024-11-28 03:05:31,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304881980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:31,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600140359] [2024-11-28 03:05:31,397 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:31,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:05:31,458 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:05:31,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:31,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:05:31,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:31,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600140359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:31,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:31,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 03:05:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969059114] [2024-11-28 03:05:31,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:31,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:05:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:31,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:05:31,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:05:31,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:31,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1176 transitions, 32080 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:31,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:31,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:31,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:37,195 INFO L124 PetriNetUnfolderBase]: 5931/10840 cut-off events. [2024-11-28 03:05:37,195 INFO L125 PetriNetUnfolderBase]: For 394187/394190 co-relation queries the response was YES. [2024-11-28 03:05:37,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113421 conditions, 10840 events. 5931/10840 cut-off events. For 394187/394190 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 87243 event pairs, 137 based on Foata normal form. 238/11076 useless extension candidates. Maximal degree in co-relation 112685. Up to 4339 conditions per place. [2024-11-28 03:05:37,368 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1052 selfloop transitions, 401 changer transitions 68/1524 dead transitions. [2024-11-28 03:05:37,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1524 transitions, 40739 flow [2024-11-28 03:05:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:05:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:05:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-11-28 03:05:37,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-11-28 03:05:37,370 INFO L175 Difference]: Start difference. First operand has 270 places, 1176 transitions, 32080 flow. Second operand 12 states and 137 transitions. [2024-11-28 03:05:37,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1524 transitions, 40739 flow [2024-11-28 03:05:40,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1524 transitions, 40311 flow, removed 188 selfloop flow, removed 5 redundant places. [2024-11-28 03:05:41,020 INFO L231 Difference]: Finished difference. Result has 282 places, 1190 transitions, 32689 flow [2024-11-28 03:05:41,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28388, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=32689, PETRI_PLACES=282, PETRI_TRANSITIONS=1190} [2024-11-28 03:05:41,021 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2024-11-28 03:05:41,021 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 1190 transitions, 32689 flow [2024-11-28 03:05:41,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:41,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:41,022 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:41,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:05:41,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:41,222 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:41,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1778201971, now seen corresponding path program 13 times [2024-11-28 03:05:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:41,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853151376] [2024-11-28 03:05:41,223 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853151376] [2024-11-28 03:05:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853151376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639289062] [2024-11-28 03:05:41,277 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:05:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:41,281 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:41,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:05:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:41,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:05:41,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:41,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:05:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639289062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:41,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:41,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-28 03:05:41,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365224356] [2024-11-28 03:05:41,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:41,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:05:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:41,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:05:41,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:05:41,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:41,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 1190 transitions, 32689 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:41,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:41,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:46,880 INFO L124 PetriNetUnfolderBase]: 5610/10169 cut-off events. [2024-11-28 03:05:46,880 INFO L125 PetriNetUnfolderBase]: For 425170/425170 co-relation queries the response was YES. [2024-11-28 03:05:46,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112230 conditions, 10169 events. 5610/10169 cut-off events. For 425170/425170 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 79516 event pairs, 271 based on Foata normal form. 380/10548 useless extension candidates. Maximal degree in co-relation 111965. Up to 5876 conditions per place. [2024-11-28 03:05:47,024 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 943 selfloop transitions, 488 changer transitions 0/1434 dead transitions. [2024-11-28 03:05:47,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1434 transitions, 40885 flow [2024-11-28 03:05:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:05:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:05:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-11-28 03:05:47,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6045454545454545 [2024-11-28 03:05:47,025 INFO L175 Difference]: Start difference. First operand has 282 places, 1190 transitions, 32689 flow. Second operand 11 states and 133 transitions. [2024-11-28 03:05:47,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1434 transitions, 40885 flow [2024-11-28 03:05:51,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1434 transitions, 38931 flow, removed 784 selfloop flow, removed 9 redundant places. [2024-11-28 03:05:51,576 INFO L231 Difference]: Finished difference. Result has 287 places, 1255 transitions, 34553 flow [2024-11-28 03:05:51,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30764, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34553, PETRI_PLACES=287, PETRI_TRANSITIONS=1255} [2024-11-28 03:05:51,577 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 266 predicate places. [2024-11-28 03:05:51,577 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 1255 transitions, 34553 flow [2024-11-28 03:05:51,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:51,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:51,577 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:51,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:51,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:05:51,781 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:51,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:51,782 INFO L85 PathProgramCache]: Analyzing trace with hash -307941596, now seen corresponding path program 14 times [2024-11-28 03:05:51,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:51,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957595632] [2024-11-28 03:05:51,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:51,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:51,790 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:51,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:05:51,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:51,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957595632] [2024-11-28 03:05:51,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957595632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:51,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:05:51,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:05:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34009332] [2024-11-28 03:05:51,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:51,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:05:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:51,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:05:51,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:05:51,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:51,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1255 transitions, 34553 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:51,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:51,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:51,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:55,830 INFO L124 PetriNetUnfolderBase]: 3743/7119 cut-off events. [2024-11-28 03:05:55,831 INFO L125 PetriNetUnfolderBase]: For 258001/258001 co-relation queries the response was YES. [2024-11-28 03:05:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77339 conditions, 7119 events. 3743/7119 cut-off events. For 258001/258001 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 55219 event pairs, 795 based on Foata normal form. 396/7513 useless extension candidates. Maximal degree in co-relation 77106. Up to 3344 conditions per place. [2024-11-28 03:05:55,902 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 709 selfloop transitions, 181 changer transitions 229/1122 dead transitions. [2024-11-28 03:05:55,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1122 transitions, 33018 flow [2024-11-28 03:05:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:05:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:05:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-11-28 03:05:55,903 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-28 03:05:55,903 INFO L175 Difference]: Start difference. First operand has 287 places, 1255 transitions, 34553 flow. Second operand 4 states and 51 transitions. [2024-11-28 03:05:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1122 transitions, 33018 flow [2024-11-28 03:05:58,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1122 transitions, 32422 flow, removed 236 selfloop flow, removed 9 redundant places. [2024-11-28 03:05:58,126 INFO L231 Difference]: Finished difference. Result has 282 places, 813 transitions, 21543 flow [2024-11-28 03:05:58,127 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26590, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21543, PETRI_PLACES=282, PETRI_TRANSITIONS=813} [2024-11-28 03:05:58,127 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2024-11-28 03:05:58,127 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 813 transitions, 21543 flow [2024-11-28 03:05:58,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:58,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:58,128 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:58,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:05:58,128 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:05:58,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash -275717579, now seen corresponding path program 4 times [2024-11-28 03:05:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:58,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051060783] [2024-11-28 03:05:58,128 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:58,135 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:58,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:05:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051060783] [2024-11-28 03:05:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051060783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433054120] [2024-11-28 03:05:58,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:58,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:58,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:58,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:05:58,258 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:58,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:58,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:05:58,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:58,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:05:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433054120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:58,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-11-28 03:05:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061809416] [2024-11-28 03:05:58,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:58,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:05:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:58,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:05:58,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:05:58,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:05:58,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 813 transitions, 21543 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:58,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:58,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:05:58,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:01,899 INFO L124 PetriNetUnfolderBase]: 4124/7796 cut-off events. [2024-11-28 03:06:01,899 INFO L125 PetriNetUnfolderBase]: For 310878/310878 co-relation queries the response was YES. [2024-11-28 03:06:01,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87005 conditions, 7796 events. 4124/7796 cut-off events. For 310878/310878 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 59458 event pairs, 307 based on Foata normal form. 140/7935 useless extension candidates. Maximal degree in co-relation 86723. Up to 2078 conditions per place. [2024-11-28 03:06:01,975 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 665 selfloop transitions, 652 changer transitions 0/1320 dead transitions. [2024-11-28 03:06:01,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1320 transitions, 37372 flow [2024-11-28 03:06:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:06:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:06:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 268 transitions. [2024-11-28 03:06:01,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5826086956521739 [2024-11-28 03:06:01,977 INFO L175 Difference]: Start difference. First operand has 282 places, 813 transitions, 21543 flow. Second operand 23 states and 268 transitions. [2024-11-28 03:06:01,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1320 transitions, 37372 flow [2024-11-28 03:06:04,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1320 transitions, 36779 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-11-28 03:06:04,609 INFO L231 Difference]: Finished difference. Result has 309 places, 1077 transitions, 31954 flow [2024-11-28 03:06:04,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21113, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=31954, PETRI_PLACES=309, PETRI_TRANSITIONS=1077} [2024-11-28 03:06:04,610 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2024-11-28 03:06:04,610 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 1077 transitions, 31954 flow [2024-11-28 03:06:04,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:04,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:04,610 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:04,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:06:04,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:06:04,811 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:04,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash 490671017, now seen corresponding path program 5 times [2024-11-28 03:06:04,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:04,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686604819] [2024-11-28 03:06:04,812 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:04,817 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:04,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686604819] [2024-11-28 03:06:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686604819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569934559] [2024-11-28 03:06:04,894 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:06:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:04,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:04,898 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:06:04,953 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:06:04,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:04,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:06:04,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:05,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569934559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:05,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:05,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-11-28 03:06:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890988942] [2024-11-28 03:06:05,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:05,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:06:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:05,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:06:05,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:06:05,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:06:05,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1077 transitions, 31954 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:05,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:05,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:06:05,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:10,146 INFO L124 PetriNetUnfolderBase]: 3979/7535 cut-off events. [2024-11-28 03:06:10,146 INFO L125 PetriNetUnfolderBase]: For 349562/349565 co-relation queries the response was YES. [2024-11-28 03:06:10,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89136 conditions, 7535 events. 3979/7535 cut-off events. For 349562/349565 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 57671 event pairs, 66 based on Foata normal form. 75/7608 useless extension candidates. Maximal degree in co-relation 88838. Up to 2008 conditions per place. [2024-11-28 03:06:10,278 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 843 selfloop transitions, 495 changer transitions 15/1356 dead transitions. [2024-11-28 03:06:10,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1356 transitions, 39790 flow [2024-11-28 03:06:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 03:06:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 03:06:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 274 transitions. [2024-11-28 03:06:10,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-11-28 03:06:10,281 INFO L175 Difference]: Start difference. First operand has 309 places, 1077 transitions, 31954 flow. Second operand 25 states and 274 transitions. [2024-11-28 03:06:10,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1356 transitions, 39790 flow [2024-11-28 03:06:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1356 transitions, 38990 flow, removed 366 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:13,862 INFO L231 Difference]: Finished difference. Result has 333 places, 1079 transitions, 32751 flow [2024-11-28 03:06:13,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30440, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=32751, PETRI_PLACES=333, PETRI_TRANSITIONS=1079} [2024-11-28 03:06:13,864 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2024-11-28 03:06:13,864 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1079 transitions, 32751 flow [2024-11-28 03:06:13,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:13,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:13,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:13,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:06:14,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:06:14,065 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:06:14,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 682824240, now seen corresponding path program 15 times [2024-11-28 03:06:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:14,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737221752] [2024-11-28 03:06:14,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:14,084 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:06:14,084 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737221752] [2024-11-28 03:06:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737221752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051079117] [2024-11-28 03:06:14,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:14,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:14,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:14,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:06:14,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:06:14,786 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:14,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:06:14,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:35,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:37,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051079117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:37,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:37,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-11-28 03:06:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65895836] [2024-11-28 03:06:37,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:37,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:06:37,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:37,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:06:37,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=509, Unknown=4, NotChecked=0, Total=600 [2024-11-28 03:06:37,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:06:37,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1079 transitions, 32751 flow. Second operand has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:06:37,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:07,029 INFO L124 PetriNetUnfolderBase]: 4465/8454 cut-off events. [2024-11-28 03:07:07,029 INFO L125 PetriNetUnfolderBase]: For 429843/429843 co-relation queries the response was YES. [2024-11-28 03:07:07,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103905 conditions, 8454 events. 4465/8454 cut-off events. For 429843/429843 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 65770 event pairs, 266 based on Foata normal form. 8/8461 useless extension candidates. Maximal degree in co-relation 103654. Up to 7445 conditions per place. [2024-11-28 03:07:07,263 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1161 selfloop transitions, 154 changer transitions 14/1332 dead transitions. [2024-11-28 03:07:07,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1332 transitions, 41814 flow [2024-11-28 03:07:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:07:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:07:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 276 transitions. [2024-11-28 03:07:07,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-28 03:07:07,265 INFO L175 Difference]: Start difference. First operand has 333 places, 1079 transitions, 32751 flow. Second operand 24 states and 276 transitions. [2024-11-28 03:07:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1332 transitions, 41814 flow [2024-11-28 03:07:11,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1332 transitions, 40107 flow, removed 509 selfloop flow, removed 11 redundant places. [2024-11-28 03:07:11,585 INFO L231 Difference]: Finished difference. Result has 355 places, 1193 transitions, 35441 flow [2024-11-28 03:07:11,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31176, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=35441, PETRI_PLACES=355, PETRI_TRANSITIONS=1193} [2024-11-28 03:07:11,587 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2024-11-28 03:07:11,587 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 1193 transitions, 35441 flow [2024-11-28 03:07:11,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:07:11,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:11,588 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:07:11,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:07:11,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:11,788 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:07:11,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1560794718, now seen corresponding path program 16 times [2024-11-28 03:07:11,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:11,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544611402] [2024-11-28 03:07:11,789 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:07:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:11,800 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:07:11,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:12,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544611402] [2024-11-28 03:07:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544611402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451699873] [2024-11-28 03:07:12,044 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:07:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:12,048 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:12,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:07:12,112 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:07:12,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:12,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:07:12,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:12,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:12,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451699873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:12,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:12,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-28 03:07:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714955356] [2024-11-28 03:07:12,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:12,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:07:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:12,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:07:12,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:07:12,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:07:12,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1193 transitions, 35441 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:07:12,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:12,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:07:12,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:19,232 INFO L124 PetriNetUnfolderBase]: 5208/9893 cut-off events. [2024-11-28 03:07:19,232 INFO L125 PetriNetUnfolderBase]: For 466733/466733 co-relation queries the response was YES. [2024-11-28 03:07:19,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119537 conditions, 9893 events. 5208/9893 cut-off events. For 466733/466733 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 78933 event pairs, 309 based on Foata normal form. 15/9907 useless extension candidates. Maximal degree in co-relation 119277. Up to 8338 conditions per place. [2024-11-28 03:07:19,383 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1278 selfloop transitions, 218 changer transitions 19/1518 dead transitions. [2024-11-28 03:07:19,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1518 transitions, 48289 flow [2024-11-28 03:07:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:07:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:07:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 229 transitions. [2024-11-28 03:07:19,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-11-28 03:07:19,384 INFO L175 Difference]: Start difference. First operand has 355 places, 1193 transitions, 35441 flow. Second operand 20 states and 229 transitions. [2024-11-28 03:07:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1518 transitions, 48289 flow [2024-11-28 03:07:23,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1518 transitions, 46887 flow, removed 689 selfloop flow, removed 6 redundant places. [2024-11-28 03:07:23,584 INFO L231 Difference]: Finished difference. Result has 377 places, 1357 transitions, 41063 flow [2024-11-28 03:07:23,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34475, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=41063, PETRI_PLACES=377, PETRI_TRANSITIONS=1357} [2024-11-28 03:07:23,585 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2024-11-28 03:07:23,585 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 1357 transitions, 41063 flow [2024-11-28 03:07:23,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:07:23,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:23,585 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:07:23,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:07:23,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:07:23,786 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:07:23,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1577640718, now seen corresponding path program 17 times [2024-11-28 03:07:23,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:23,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405413794] [2024-11-28 03:07:23,786 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:07:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:23,796 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:07:23,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405413794] [2024-11-28 03:07:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405413794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594419458] [2024-11-28 03:07:24,247 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:07:24,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:24,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:24,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:07:24,319 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:07:24,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:07:24,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:07:24,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:40,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:41,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594419458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:41,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:41,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2024-11-28 03:07:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487918163] [2024-11-28 03:07:41,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:41,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:07:41,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:41,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:07:41,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=357, Unknown=4, NotChecked=0, Total=420 [2024-11-28 03:07:41,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-28 03:07:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1357 transitions, 41063 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:07:41,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:41,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-28 03:07:41,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:08:17,042 INFO L124 PetriNetUnfolderBase]: 5604/10660 cut-off events. [2024-11-28 03:08:17,042 INFO L125 PetriNetUnfolderBase]: For 524680/524680 co-relation queries the response was YES. [2024-11-28 03:08:17,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130646 conditions, 10660 events. 5604/10660 cut-off events. For 524680/524680 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 86540 event pairs, 368 based on Foata normal form. 9/10668 useless extension candidates. Maximal degree in co-relation 130374. Up to 9819 conditions per place. [2024-11-28 03:08:17,194 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1457 selfloop transitions, 98 changer transitions 5/1563 dead transitions. [2024-11-28 03:08:17,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1563 transitions, 50305 flow [2024-11-28 03:08:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:08:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:08:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 214 transitions. [2024-11-28 03:08:17,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5631578947368421 [2024-11-28 03:08:17,196 INFO L175 Difference]: Start difference. First operand has 377 places, 1357 transitions, 41063 flow. Second operand 19 states and 214 transitions. [2024-11-28 03:08:17,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1563 transitions, 50305 flow [2024-11-28 03:08:23,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1563 transitions, 49304 flow, removed 488 selfloop flow, removed 7 redundant places. [2024-11-28 03:08:23,259 INFO L231 Difference]: Finished difference. Result has 395 places, 1432 transitions, 43243 flow [2024-11-28 03:08:23,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40062, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=43243, PETRI_PLACES=395, PETRI_TRANSITIONS=1432} [2024-11-28 03:08:23,260 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2024-11-28 03:08:23,260 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 1432 transitions, 43243 flow [2024-11-28 03:08:23,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:08:23,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:08:23,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:08:23,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:08:23,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bf30fa-e834-47d2-9ff3-0687b94d4c8e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:08:23,461 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:08:23,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:08:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash 71152448, now seen corresponding path program 18 times [2024-11-28 03:08:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:08:23,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921386626] [2024-11-28 03:08:23,462 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:08:23,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:08:23,476 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:08:23,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat