./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:39:04,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:39:05,112 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:39:05,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:39:05,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:39:05,161 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:39:05,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:39:05,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:39:05,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:39:05,169 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:39:05,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:39:05,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:39:05,171 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:39:05,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:39:05,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:39:05,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:39:05,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:39:05,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:39:05,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:39:05,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:39:05,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:39:05,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:39:05,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:39:05,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:39:05,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:39:05,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:39:05,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:39:05,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:39:05,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:05,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:39:05,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:39:05,186 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:39:05,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:39:05,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:39:05,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:39:05,187 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:39:05,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:39:05,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:39:05,188 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:39:05,189 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2023-11-06 22:39:05,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:39:05,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:39:05,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:39:05,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:39:05,586 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:39:05,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 22:39:08,766 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:39:09,066 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:39:09,066 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 22:39:09,078 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/data/7b2350742/d48a330052aa483eb8a79811a4d90e94/FLAGfffdb79ec [2023-11-06 22:39:09,104 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/data/7b2350742/d48a330052aa483eb8a79811a4d90e94 [2023-11-06 22:39:09,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:39:09,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:39:09,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:09,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:39:09,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:39:09,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5720c195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09, skipping insertion in model container [2023-11-06 22:39:09,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,147 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:39:09,333 WARN L240 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_a58c37d3-81f9-4246-9100-6edfdeb1e79b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-11-06 22:39:09,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:09,348 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:39:09,370 WARN L240 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_a58c37d3-81f9-4246-9100-6edfdeb1e79b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-11-06 22:39:09,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:09,381 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:09,381 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:09,389 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:39:09,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09 WrapperNode [2023-11-06 22:39:09,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:09,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:09,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:39:09,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:39:09,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,428 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-06 22:39:09,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:09,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:39:09,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:39:09,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:39:09,438 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:39:09,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:39:09,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:39:09,458 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:39:09,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (1/1) ... [2023-11-06 22:39:09,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:09,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:09,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:39:09,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:39:09,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:39:09,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:39:09,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:39:09,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:39:09,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:39:09,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:39:09,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:39:09,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:39:09,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:39:09,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:39:09,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:39:09,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:39:09,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:39:09,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:39:09,538 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:39:09,645 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:39:09,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:39:09,843 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:39:09,888 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:39:09,888 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:39:09,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:09 BoogieIcfgContainer [2023-11-06 22:39:09,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:39:09,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:39:09,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:39:09,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:39:09,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:09" (1/3) ... [2023-11-06 22:39:09,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb0502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:09, skipping insertion in model container [2023-11-06 22:39:09,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:09" (2/3) ... [2023-11-06 22:39:09,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb0502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:09, skipping insertion in model container [2023-11-06 22:39:09,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:09" (3/3) ... [2023-11-06 22:39:09,902 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 22:39:09,910 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:39:09,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:39:09,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:39:09,920 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:39:09,996 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:39:10,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 184 flow [2023-11-06 22:39:10,086 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-06 22:39:10,086 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:39:10,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 6/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:39:10,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 184 flow [2023-11-06 22:39:10,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-11-06 22:39:10,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:39:10,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-11-06 22:39:10,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-11-06 22:39:10,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-11-06 22:39:10,144 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-11-06 22:39:10,144 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:39:10,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-06 22:39:10,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-11-06 22:39:12,871 INFO L134 LiptonReduction]: Checked pairs total: 498 [2023-11-06 22:39:12,873 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-11-06 22:39:12,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:39:12,914 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7e586078, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:39:12,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:39:12,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:39:12,921 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:39:12,921 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:39:12,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:12,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:12,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:12,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2005903606, now seen corresponding path program 1 times [2023-11-06 22:39:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:12,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834767176] [2023-11-06 22:39:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:13,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834767176] [2023-11-06 22:39:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834767176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:13,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:39:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:39:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352542960] [2023-11-06 22:39:13,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:13,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:39:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:39:13,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:39:13,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 157 [2023-11-06 22:39:13,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2023-11-06 22:39:13,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:13,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 157 [2023-11-06 22:39:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:13,382 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-11-06 22:39:13,382 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:39:13,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-11-06 22:39:13,385 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 22:39:13,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-11-06 22:39:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:39:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:39:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2023-11-06 22:39:13,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47929936305732485 [2023-11-06 22:39:13,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2023-11-06 22:39:13,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2023-11-06 22:39:13,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:13,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2023-11-06 22:39:13,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 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) [2023-11-06 22:39:13,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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) [2023-11-06 22:39:13,419 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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) [2023-11-06 22:39:13,421 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 301 transitions. [2023-11-06 22:39:13,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-11-06 22:39:13,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:39:13,427 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-06 22:39:13,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-06 22:39:13,432 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-06 22:39:13,433 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-06 22:39:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2023-11-06 22:39:13,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:13,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:13,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:39:13,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:13,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash 983039680, now seen corresponding path program 1 times [2023-11-06 22:39:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:13,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072954611] [2023-11-06 22:39:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:13,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072954611] [2023-11-06 22:39:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072954611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:13,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:39:13,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:39:13,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843332086] [2023-11-06 22:39:13,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:39:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:39:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:39:13,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 157 [2023-11-06 22:39:13,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-11-06 22:39:13,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:13,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 157 [2023-11-06 22:39:13,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:13,624 INFO L124 PetriNetUnfolderBase]: 51/94 cut-off events. [2023-11-06 22:39:13,624 INFO L125 PetriNetUnfolderBase]: For 15/20 co-relation queries the response was YES. [2023-11-06 22:39:13,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 94 events. 51/94 cut-off events. For 15/20 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 223 event pairs, 16 based on Foata normal form. 5/79 useless extension candidates. Maximal degree in co-relation 86. Up to 73 conditions per place. [2023-11-06 22:39:13,626 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-06 22:39:13,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-11-06 22:39:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:39:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:39:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2023-11-06 22:39:13,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46656050955414013 [2023-11-06 22:39:13,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2023-11-06 22:39:13,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2023-11-06 22:39:13,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:13,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2023-11-06 22:39:13,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2023-11-06 22:39:13,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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) [2023-11-06 22:39:13,635 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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) [2023-11-06 22:39:13,635 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 293 transitions. [2023-11-06 22:39:13,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-11-06 22:39:13,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:39:13,637 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-06 22:39:13,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-06 22:39:13,638 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-06 22:39:13,639 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-06 22:39:13,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-11-06 22:39:13,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:13,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:39:13,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:13,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 524241273, now seen corresponding path program 1 times [2023-11-06 22:39:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182531430] [2023-11-06 22:39:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:13,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182531430] [2023-11-06 22:39:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182531430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:13,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328418106] [2023-11-06 22:39:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:13,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:13,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:13,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:39:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:14,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:39:14,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:14,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:39:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328418106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:14,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:39:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105660709] [2023-11-06 22:39:14,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:14,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:39:14,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:39:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:39:14,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 157 [2023-11-06 22:39:14,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 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) [2023-11-06 22:39:14,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:14,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 157 [2023-11-06 22:39:14,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:14,626 INFO L124 PetriNetUnfolderBase]: 64/116 cut-off events. [2023-11-06 22:39:14,627 INFO L125 PetriNetUnfolderBase]: For 31/37 co-relation queries the response was YES. [2023-11-06 22:39:14,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 116 events. 64/116 cut-off events. For 31/37 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 267 event pairs, 12 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 90. Up to 83 conditions per place. [2023-11-06 22:39:14,629 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-06 22:39:14,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 163 flow [2023-11-06 22:39:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:39:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:39:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2023-11-06 22:39:14,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713375796178344 [2023-11-06 22:39:14,633 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 370 transitions. [2023-11-06 22:39:14,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 370 transitions. [2023-11-06 22:39:14,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:14,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 370 transitions. [2023-11-06 22:39:14,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 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) [2023-11-06 22:39:14,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 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) [2023-11-06 22:39:14,640 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 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) [2023-11-06 22:39:14,640 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 5 states and 370 transitions. [2023-11-06 22:39:14,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 163 flow [2023-11-06 22:39:14,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 154 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:39:14,643 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 92 flow [2023-11-06 22:39:14,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-06 22:39:14,644 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-06 22:39:14,644 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 92 flow [2023-11-06 22:39:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 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) [2023-11-06 22:39:14,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:14,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:14,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:14,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:14,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:14,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1643752153, now seen corresponding path program 2 times [2023-11-06 22:39:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822967605] [2023-11-06 22:39:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:14,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:15,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822967605] [2023-11-06 22:39:15,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822967605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:15,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682258352] [2023-11-06 22:39:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:15,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:15,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:15,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:15,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:39:15,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:15,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:15,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:15,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:15,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:16,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682258352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:16,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610245484] [2023-11-06 22:39:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:16,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:16,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 92 flow. Second operand has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 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) [2023-11-06 22:39:16,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:16,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:17,405 INFO L124 PetriNetUnfolderBase]: 167/316 cut-off events. [2023-11-06 22:39:17,406 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-11-06 22:39:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 316 events. 167/316 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1169 event pairs, 20 based on Foata normal form. 2/284 useless extension candidates. Maximal degree in co-relation 472. Up to 113 conditions per place. [2023-11-06 22:39:17,411 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 57 selfloop transitions, 25 changer transitions 29/111 dead transitions. [2023-11-06 22:39:17,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 111 transitions, 634 flow [2023-11-06 22:39:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:39:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:39:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1204 transitions. [2023-11-06 22:39:17,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42604387827317763 [2023-11-06 22:39:17,418 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1204 transitions. [2023-11-06 22:39:17,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1204 transitions. [2023-11-06 22:39:17,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:17,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1204 transitions. [2023-11-06 22:39:17,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 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) [2023-11-06 22:39:17,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 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) [2023-11-06 22:39:17,433 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 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) [2023-11-06 22:39:17,433 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 92 flow. Second operand 18 states and 1204 transitions. [2023-11-06 22:39:17,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 111 transitions, 634 flow [2023-11-06 22:39:17,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 111 transitions, 620 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 22:39:17,440 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 300 flow [2023-11-06 22:39:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=300, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-11-06 22:39:17,441 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-11-06 22:39:17,442 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 300 flow [2023-11-06 22:39:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 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) [2023-11-06 22:39:17,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:17,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:17,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:39:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:17,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:17,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 283973881, now seen corresponding path program 3 times [2023-11-06 22:39:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768246933] [2023-11-06 22:39:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768246933] [2023-11-06 22:39:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768246933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894265886] [2023-11-06 22:39:17,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:17,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:17,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:17,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:39:18,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:39:18,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:18,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:18,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:18,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894265886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:18,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377107647] [2023-11-06 22:39:18,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:19,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:19,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 300 flow. Second operand has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 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) [2023-11-06 22:39:19,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:19,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:19,892 INFO L124 PetriNetUnfolderBase]: 164/330 cut-off events. [2023-11-06 22:39:19,892 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2023-11-06 22:39:19,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 330 events. 164/330 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1324 event pairs, 22 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 1377. Up to 143 conditions per place. [2023-11-06 22:39:19,899 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 58 selfloop transitions, 28 changer transitions 20/106 dead transitions. [2023-11-06 22:39:19,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 791 flow [2023-11-06 22:39:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:39:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:39:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1136 transitions. [2023-11-06 22:39:19,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256275758711128 [2023-11-06 22:39:19,905 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1136 transitions. [2023-11-06 22:39:19,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1136 transitions. [2023-11-06 22:39:19,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:19,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1136 transitions. [2023-11-06 22:39:19,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.82352941176471) internal successors, (1136), 17 states have internal predecessors, (1136), 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) [2023-11-06 22:39:19,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 157.0) internal successors, (2826), 18 states have internal predecessors, (2826), 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) [2023-11-06 22:39:19,920 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 157.0) internal successors, (2826), 18 states have internal predecessors, (2826), 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) [2023-11-06 22:39:19,921 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 300 flow. Second operand 17 states and 1136 transitions. [2023-11-06 22:39:19,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 791 flow [2023-11-06 22:39:19,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 700 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-11-06 22:39:19,933 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 350 flow [2023-11-06 22:39:19,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=350, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-11-06 22:39:19,937 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-11-06 22:39:19,937 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 350 flow [2023-11-06 22:39:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 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) [2023-11-06 22:39:19,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:19,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:20,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:20,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:20,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1944787431, now seen corresponding path program 4 times [2023-11-06 22:39:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691664853] [2023-11-06 22:39:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691664853] [2023-11-06 22:39:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691664853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:20,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659684641] [2023-11-06 22:39:20,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:20,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:20,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:39:20,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:20,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:39:20,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:20,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659684641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:21,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597871785] [2023-11-06 22:39:21,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:21,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:21,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:21,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 350 flow. Second operand has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:21,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:21,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:21,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:22,446 INFO L124 PetriNetUnfolderBase]: 213/415 cut-off events. [2023-11-06 22:39:22,446 INFO L125 PetriNetUnfolderBase]: For 1191/1191 co-relation queries the response was YES. [2023-11-06 22:39:22,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 415 events. 213/415 cut-off events. For 1191/1191 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1739 event pairs, 12 based on Foata normal form. 2/417 useless extension candidates. Maximal degree in co-relation 1738. Up to 175 conditions per place. [2023-11-06 22:39:22,454 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 69 selfloop transitions, 41 changer transitions 19/129 dead transitions. [2023-11-06 22:39:22,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1002 flow [2023-11-06 22:39:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:39:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:39:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1334 transitions. [2023-11-06 22:39:22,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248407643312102 [2023-11-06 22:39:22,462 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1334 transitions. [2023-11-06 22:39:22,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1334 transitions. [2023-11-06 22:39:22,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:22,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1334 transitions. [2023-11-06 22:39:22,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 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) [2023-11-06 22:39:22,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 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) [2023-11-06 22:39:22,480 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 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) [2023-11-06 22:39:22,480 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 350 flow. Second operand 20 states and 1334 transitions. [2023-11-06 22:39:22,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1002 flow [2023-11-06 22:39:22,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 129 transitions, 887 flow, removed 26 selfloop flow, removed 14 redundant places. [2023-11-06 22:39:22,491 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 527 flow [2023-11-06 22:39:22,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=527, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2023-11-06 22:39:22,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-11-06 22:39:22,495 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 527 flow [2023-11-06 22:39:22,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:22,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:22,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:22,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:22,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:22,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:22,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1794998423, now seen corresponding path program 5 times [2023-11-06 22:39:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618027688] [2023-11-06 22:39:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:23,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618027688] [2023-11-06 22:39:23,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618027688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276027281] [2023-11-06 22:39:23,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:23,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:23,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:23,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:39:23,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:23,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:23,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:39:23,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:23,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276027281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:23,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449077935] [2023-11-06 22:39:23,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:24,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:24,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 527 flow. Second operand has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 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) [2023-11-06 22:39:24,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:24,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:24,937 INFO L124 PetriNetUnfolderBase]: 285/564 cut-off events. [2023-11-06 22:39:24,937 INFO L125 PetriNetUnfolderBase]: For 1998/1998 co-relation queries the response was YES. [2023-11-06 22:39:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 564 events. 285/564 cut-off events. For 1998/1998 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2687 event pairs, 32 based on Foata normal form. 4/568 useless extension candidates. Maximal degree in co-relation 2598. Up to 353 conditions per place. [2023-11-06 22:39:24,944 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 85 selfloop transitions, 37 changer transitions 25/147 dead transitions. [2023-11-06 22:39:24,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1313 flow [2023-11-06 22:39:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:39:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:39:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1388 transitions. [2023-11-06 22:39:24,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42098877767667575 [2023-11-06 22:39:24,951 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1388 transitions. [2023-11-06 22:39:24,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1388 transitions. [2023-11-06 22:39:24,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:24,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1388 transitions. [2023-11-06 22:39:24,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.0952380952381) internal successors, (1388), 21 states have internal predecessors, (1388), 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) [2023-11-06 22:39:24,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 157.0) internal successors, (3454), 22 states have internal predecessors, (3454), 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) [2023-11-06 22:39:24,966 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 157.0) internal successors, (3454), 22 states have internal predecessors, (3454), 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) [2023-11-06 22:39:24,966 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 527 flow. Second operand 21 states and 1388 transitions. [2023-11-06 22:39:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1313 flow [2023-11-06 22:39:24,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 147 transitions, 1200 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-11-06 22:39:24,984 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 753 flow [2023-11-06 22:39:24,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=753, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2023-11-06 22:39:24,985 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 75 predicate places. [2023-11-06 22:39:24,986 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 753 flow [2023-11-06 22:39:24,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 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) [2023-11-06 22:39:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:24,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:25,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:25,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:25,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -134184873, now seen corresponding path program 6 times [2023-11-06 22:39:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:25,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23481433] [2023-11-06 22:39:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:25,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:25,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23481433] [2023-11-06 22:39:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23481433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264121292] [2023-11-06 22:39:25,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:39:25,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:25,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:25,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:25,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:39:25,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:39:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:25,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:25,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:25,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264121292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:26,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:26,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:26,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078378258] [2023-11-06 22:39:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:26,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:26,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:26,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:26,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 753 flow. Second operand has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:26,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:26,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:26,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:27,165 INFO L124 PetriNetUnfolderBase]: 264/510 cut-off events. [2023-11-06 22:39:27,165 INFO L125 PetriNetUnfolderBase]: For 2248/2248 co-relation queries the response was YES. [2023-11-06 22:39:27,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2594 conditions, 510 events. 264/510 cut-off events. For 2248/2248 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2266 event pairs, 30 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 2526. Up to 405 conditions per place. [2023-11-06 22:39:27,172 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 81 selfloop transitions, 22 changer transitions 16/119 dead transitions. [2023-11-06 22:39:27,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 119 transitions, 1221 flow [2023-11-06 22:39:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:39:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:39:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 855 transitions. [2023-11-06 22:39:27,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189122978931896 [2023-11-06 22:39:27,176 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 855 transitions. [2023-11-06 22:39:27,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 855 transitions. [2023-11-06 22:39:27,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:27,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 855 transitions. [2023-11-06 22:39:27,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.76923076923077) internal successors, (855), 13 states have internal predecessors, (855), 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) [2023-11-06 22:39:27,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 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) [2023-11-06 22:39:27,184 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 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) [2023-11-06 22:39:27,185 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 753 flow. Second operand 13 states and 855 transitions. [2023-11-06 22:39:27,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 119 transitions, 1221 flow [2023-11-06 22:39:27,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 119 transitions, 1127 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-06 22:39:27,242 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 741 flow [2023-11-06 22:39:27,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=741, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2023-11-06 22:39:27,243 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-11-06 22:39:27,243 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 741 flow [2023-11-06 22:39:27,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:27,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:27,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:27,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:27,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:27,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:27,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:27,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1249183519, now seen corresponding path program 7 times [2023-11-06 22:39:27,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:27,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302437673] [2023-11-06 22:39:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:27,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:27,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302437673] [2023-11-06 22:39:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302437673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074767218] [2023-11-06 22:39:27,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:39:27,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:27,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:27,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:39:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:27,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:27,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:28,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:28,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074767218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:28,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:28,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 22:39:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239604151] [2023-11-06 22:39:28,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:28,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:39:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:39:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:39:28,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:28,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 741 flow. Second operand has 21 states, 21 states have (on average 62.76190476190476) internal successors, (1318), 21 states have internal predecessors, (1318), 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) [2023-11-06 22:39:28,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:28,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:28,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:29,426 INFO L124 PetriNetUnfolderBase]: 256/498 cut-off events. [2023-11-06 22:39:29,427 INFO L125 PetriNetUnfolderBase]: For 2004/2004 co-relation queries the response was YES. [2023-11-06 22:39:29,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 498 events. 256/498 cut-off events. For 2004/2004 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2190 event pairs, 20 based on Foata normal form. 2/500 useless extension candidates. Maximal degree in co-relation 2387. Up to 336 conditions per place. [2023-11-06 22:39:29,433 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 88 selfloop transitions, 27 changer transitions 20/135 dead transitions. [2023-11-06 22:39:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 135 transitions, 1301 flow [2023-11-06 22:39:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:39:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:39:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 933 transitions. [2023-11-06 22:39:29,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244767970882621 [2023-11-06 22:39:29,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 933 transitions. [2023-11-06 22:39:29,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 933 transitions. [2023-11-06 22:39:29,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:29,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 933 transitions. [2023-11-06 22:39:29,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 66.64285714285714) internal successors, (933), 14 states have internal predecessors, (933), 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) [2023-11-06 22:39:29,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 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) [2023-11-06 22:39:29,448 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 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) [2023-11-06 22:39:29,448 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 741 flow. Second operand 14 states and 933 transitions. [2023-11-06 22:39:29,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 135 transitions, 1301 flow [2023-11-06 22:39:29,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1239 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-06 22:39:29,470 INFO L231 Difference]: Finished difference. Result has 105 places, 85 transitions, 795 flow [2023-11-06 22:39:29,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=795, PETRI_PLACES=105, PETRI_TRANSITIONS=85} [2023-11-06 22:39:29,472 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-11-06 22:39:29,472 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 85 transitions, 795 flow [2023-11-06 22:39:29,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.76190476190476) internal successors, (1318), 21 states have internal predecessors, (1318), 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) [2023-11-06 22:39:29,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:29,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:29,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:39:29,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:29,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 406296481, now seen corresponding path program 8 times [2023-11-06 22:39:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:29,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879989183] [2023-11-06 22:39:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:29,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879989183] [2023-11-06 22:39:29,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879989183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704947616] [2023-11-06 22:39:29,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:29,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:29,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:39:30,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:30,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:30,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:30,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704947616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:30,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:30,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-06 22:39:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48979443] [2023-11-06 22:39:30,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:30,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:39:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:39:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:39:30,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 85 transitions, 795 flow. Second operand has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:31,502 INFO L124 PetriNetUnfolderBase]: 228/432 cut-off events. [2023-11-06 22:39:31,502 INFO L125 PetriNetUnfolderBase]: For 1613/1613 co-relation queries the response was YES. [2023-11-06 22:39:31,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193 conditions, 432 events. 228/432 cut-off events. For 1613/1613 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1734 event pairs, 18 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 2130. Up to 337 conditions per place. [2023-11-06 22:39:31,508 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 83 selfloop transitions, 25 changer transitions 9/117 dead transitions. [2023-11-06 22:39:31,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 117 transitions, 1218 flow [2023-11-06 22:39:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:39:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:39:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 851 transitions. [2023-11-06 22:39:31,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416952474277315 [2023-11-06 22:39:31,515 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 851 transitions. [2023-11-06 22:39:31,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 851 transitions. [2023-11-06 22:39:31,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:31,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 851 transitions. [2023-11-06 22:39:31,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.46153846153847) internal successors, (851), 13 states have internal predecessors, (851), 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) [2023-11-06 22:39:31,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 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) [2023-11-06 22:39:31,525 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 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) [2023-11-06 22:39:31,525 INFO L175 Difference]: Start difference. First operand has 105 places, 85 transitions, 795 flow. Second operand 13 states and 851 transitions. [2023-11-06 22:39:31,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 117 transitions, 1218 flow [2023-11-06 22:39:31,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 117 transitions, 1116 flow, removed 27 selfloop flow, removed 14 redundant places. [2023-11-06 22:39:31,542 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 791 flow [2023-11-06 22:39:31,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=791, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-11-06 22:39:31,544 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2023-11-06 22:39:31,544 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 791 flow [2023-11-06 22:39:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.86363636363637) internal successors, (1383), 22 states have internal predecessors, (1383), 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) [2023-11-06 22:39:31,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:31,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:31,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:31,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:39:31,761 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:31,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:31,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2127900918, now seen corresponding path program 9 times [2023-11-06 22:39:31,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:31,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65597386] [2023-11-06 22:39:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65597386] [2023-11-06 22:39:32,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65597386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427698088] [2023-11-06 22:39:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:32,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:32,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:32,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:39:32,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:39:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:32,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:32,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:32,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427698088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:32,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:32,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178715144] [2023-11-06 22:39:32,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:32,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:33,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:33,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 86 transitions, 791 flow. Second operand has 25 states, 25 states have (on average 62.8) internal successors, (1570), 25 states have internal predecessors, (1570), 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) [2023-11-06 22:39:33,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:33,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:33,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:34,551 INFO L124 PetriNetUnfolderBase]: 298/588 cut-off events. [2023-11-06 22:39:34,551 INFO L125 PetriNetUnfolderBase]: For 2794/2794 co-relation queries the response was YES. [2023-11-06 22:39:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 588 events. 298/588 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2759 event pairs, 12 based on Foata normal form. 3/591 useless extension candidates. Maximal degree in co-relation 2877. Up to 179 conditions per place. [2023-11-06 22:39:34,560 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 105 selfloop transitions, 88 changer transitions 20/213 dead transitions. [2023-11-06 22:39:34,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 1908 flow [2023-11-06 22:39:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:39:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:39:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1992 transitions. [2023-11-06 22:39:34,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229299363057325 [2023-11-06 22:39:34,566 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1992 transitions. [2023-11-06 22:39:34,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1992 transitions. [2023-11-06 22:39:34,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:34,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1992 transitions. [2023-11-06 22:39:34,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.4) internal successors, (1992), 30 states have internal predecessors, (1992), 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) [2023-11-06 22:39:34,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 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) [2023-11-06 22:39:34,581 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 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) [2023-11-06 22:39:34,582 INFO L175 Difference]: Start difference. First operand has 100 places, 86 transitions, 791 flow. Second operand 30 states and 1992 transitions. [2023-11-06 22:39:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 1908 flow [2023-11-06 22:39:34,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 213 transitions, 1800 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-11-06 22:39:34,600 INFO L231 Difference]: Finished difference. Result has 123 places, 115 transitions, 1202 flow [2023-11-06 22:39:34,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1202, PETRI_PLACES=123, PETRI_TRANSITIONS=115} [2023-11-06 22:39:34,602 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-11-06 22:39:34,602 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 115 transitions, 1202 flow [2023-11-06 22:39:34,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.8) internal successors, (1570), 25 states have internal predecessors, (1570), 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) [2023-11-06 22:39:34,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:34,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:34,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:34,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:34,809 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:34,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 807288106, now seen corresponding path program 10 times [2023-11-06 22:39:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:34,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152528978] [2023-11-06 22:39:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152528978] [2023-11-06 22:39:35,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152528978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617949487] [2023-11-06 22:39:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:35,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:35,068 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:35,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:39:35,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:35,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:35,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:35,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:35,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617949487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:35,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:35,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:35,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543334480] [2023-11-06 22:39:35,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:36,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:36,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 115 transitions, 1202 flow. Second operand has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:36,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:36,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:37,750 INFO L124 PetriNetUnfolderBase]: 320/644 cut-off events. [2023-11-06 22:39:37,750 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2023-11-06 22:39:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 644 events. 320/644 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3182 event pairs, 10 based on Foata normal form. 3/647 useless extension candidates. Maximal degree in co-relation 3583. Up to 237 conditions per place. [2023-11-06 22:39:37,760 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 101 selfloop transitions, 86 changer transitions 20/207 dead transitions. [2023-11-06 22:39:37,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 207 transitions, 2060 flow [2023-11-06 22:39:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:39:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:39:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1921 transitions. [2023-11-06 22:39:37,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219196134416868 [2023-11-06 22:39:37,767 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1921 transitions. [2023-11-06 22:39:37,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1921 transitions. [2023-11-06 22:39:37,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:37,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1921 transitions. [2023-11-06 22:39:37,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 66.24137931034483) internal successors, (1921), 29 states have internal predecessors, (1921), 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) [2023-11-06 22:39:37,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 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) [2023-11-06 22:39:37,784 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 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) [2023-11-06 22:39:37,784 INFO L175 Difference]: Start difference. First operand has 123 places, 115 transitions, 1202 flow. Second operand 29 states and 1921 transitions. [2023-11-06 22:39:37,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 207 transitions, 2060 flow [2023-11-06 22:39:37,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 207 transitions, 1700 flow, removed 117 selfloop flow, removed 18 redundant places. [2023-11-06 22:39:37,814 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 1151 flow [2023-11-06 22:39:37,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1151, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2023-11-06 22:39:37,816 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-11-06 22:39:37,816 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 1151 flow [2023-11-06 22:39:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:37,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:37,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:38,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:38,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:38,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1854571270, now seen corresponding path program 11 times [2023-11-06 22:39:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75738855] [2023-11-06 22:39:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75738855] [2023-11-06 22:39:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75738855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995832759] [2023-11-06 22:39:38,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:38,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:38,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:39:38,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:38,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:38,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:38,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995832759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:39,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812882831] [2023-11-06 22:39:39,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:39,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:39,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 1151 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:39,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:39,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:41,011 INFO L124 PetriNetUnfolderBase]: 385/786 cut-off events. [2023-11-06 22:39:41,012 INFO L125 PetriNetUnfolderBase]: For 5654/5654 co-relation queries the response was YES. [2023-11-06 22:39:41,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4299 conditions, 786 events. 385/786 cut-off events. For 5654/5654 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4187 event pairs, 18 based on Foata normal form. 4/790 useless extension candidates. Maximal degree in co-relation 4258. Up to 275 conditions per place. [2023-11-06 22:39:41,023 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 121 selfloop transitions, 104 changer transitions 27/252 dead transitions. [2023-11-06 22:39:41,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 252 transitions, 2400 flow [2023-11-06 22:39:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:39:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:39:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2324 transitions. [2023-11-06 22:39:41,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229299363057325 [2023-11-06 22:39:41,029 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2324 transitions. [2023-11-06 22:39:41,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2324 transitions. [2023-11-06 22:39:41,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:41,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2324 transitions. [2023-11-06 22:39:41,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.4) internal successors, (2324), 35 states have internal predecessors, (2324), 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) [2023-11-06 22:39:41,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 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) [2023-11-06 22:39:41,046 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 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) [2023-11-06 22:39:41,046 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 1151 flow. Second operand 35 states and 2324 transitions. [2023-11-06 22:39:41,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 252 transitions, 2400 flow [2023-11-06 22:39:41,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 252 transitions, 2198 flow, removed 33 selfloop flow, removed 20 redundant places. [2023-11-06 22:39:41,074 INFO L231 Difference]: Finished difference. Result has 160 places, 140 transitions, 1501 flow [2023-11-06 22:39:41,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1501, PETRI_PLACES=160, PETRI_TRANSITIONS=140} [2023-11-06 22:39:41,076 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2023-11-06 22:39:41,076 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 140 transitions, 1501 flow [2023-11-06 22:39:41,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:41,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:41,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:41,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:39:41,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:39:41,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:41,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash 519356826, now seen corresponding path program 12 times [2023-11-06 22:39:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:41,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029587230] [2023-11-06 22:39:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:41,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:41,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029587230] [2023-11-06 22:39:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029587230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183839976] [2023-11-06 22:39:41,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:39:41,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:41,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:41,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:41,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:39:41,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:39:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:41,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:41,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:41,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183839976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:42,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:42,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276105122] [2023-11-06 22:39:42,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:42,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:42,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 140 transitions, 1501 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:42,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:42,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:42,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:43,395 INFO L124 PetriNetUnfolderBase]: 414/836 cut-off events. [2023-11-06 22:39:43,395 INFO L125 PetriNetUnfolderBase]: For 8099/8099 co-relation queries the response was YES. [2023-11-06 22:39:43,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 836 events. 414/836 cut-off events. For 8099/8099 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4440 event pairs, 56 based on Foata normal form. 6/842 useless extension candidates. Maximal degree in co-relation 4875. Up to 477 conditions per place. [2023-11-06 22:39:43,407 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 97 selfloop transitions, 80 changer transitions 40/217 dead transitions. [2023-11-06 22:39:43,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 217 transitions, 2431 flow [2023-11-06 22:39:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:39:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:39:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1699 transitions. [2023-11-06 22:39:43,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41621754042136205 [2023-11-06 22:39:43,413 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1699 transitions. [2023-11-06 22:39:43,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1699 transitions. [2023-11-06 22:39:43,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:43,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1699 transitions. [2023-11-06 22:39:43,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.34615384615384) internal successors, (1699), 26 states have internal predecessors, (1699), 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) [2023-11-06 22:39:43,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 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) [2023-11-06 22:39:43,426 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 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) [2023-11-06 22:39:43,426 INFO L175 Difference]: Start difference. First operand has 160 places, 140 transitions, 1501 flow. Second operand 26 states and 1699 transitions. [2023-11-06 22:39:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 217 transitions, 2431 flow [2023-11-06 22:39:43,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 217 transitions, 2145 flow, removed 88 selfloop flow, removed 22 redundant places. [2023-11-06 22:39:43,473 INFO L231 Difference]: Finished difference. Result has 168 places, 145 transitions, 1603 flow [2023-11-06 22:39:43,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1603, PETRI_PLACES=168, PETRI_TRANSITIONS=145} [2023-11-06 22:39:43,474 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-06 22:39:43,474 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 145 transitions, 1603 flow [2023-11-06 22:39:43,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:43,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:43,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:43,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:39:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:43,681 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:43,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 314978592, now seen corresponding path program 13 times [2023-11-06 22:39:43,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:43,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147033533] [2023-11-06 22:39:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147033533] [2023-11-06 22:39:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147033533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799088697] [2023-11-06 22:39:43,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:39:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:43,962 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:43,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:39:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:44,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:44,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:44,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799088697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800567383] [2023-11-06 22:39:44,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:45,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:45,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 145 transitions, 1603 flow. Second operand has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:45,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:45,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:45,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:46,646 INFO L124 PetriNetUnfolderBase]: 490/1004 cut-off events. [2023-11-06 22:39:46,646 INFO L125 PetriNetUnfolderBase]: For 12038/12038 co-relation queries the response was YES. [2023-11-06 22:39:46,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 1004 events. 490/1004 cut-off events. For 12038/12038 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5704 event pairs, 64 based on Foata normal form. 4/1008 useless extension candidates. Maximal degree in co-relation 6329. Up to 549 conditions per place. [2023-11-06 22:39:46,659 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 159 selfloop transitions, 104 changer transitions 27/290 dead transitions. [2023-11-06 22:39:46,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 290 transitions, 3295 flow [2023-11-06 22:39:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:39:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:39:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2450 transitions. [2023-11-06 22:39:46,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217593389567912 [2023-11-06 22:39:46,665 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2450 transitions. [2023-11-06 22:39:46,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2450 transitions. [2023-11-06 22:39:46,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:46,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2450 transitions. [2023-11-06 22:39:46,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 66.21621621621621) internal successors, (2450), 37 states have internal predecessors, (2450), 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) [2023-11-06 22:39:46,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 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) [2023-11-06 22:39:46,683 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 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) [2023-11-06 22:39:46,683 INFO L175 Difference]: Start difference. First operand has 168 places, 145 transitions, 1603 flow. Second operand 37 states and 2450 transitions. [2023-11-06 22:39:46,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 290 transitions, 3295 flow [2023-11-06 22:39:46,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 290 transitions, 2977 flow, removed 128 selfloop flow, removed 20 redundant places. [2023-11-06 22:39:46,759 INFO L231 Difference]: Finished difference. Result has 184 places, 177 transitions, 2136 flow [2023-11-06 22:39:46,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2136, PETRI_PLACES=184, PETRI_TRANSITIONS=177} [2023-11-06 22:39:46,761 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2023-11-06 22:39:46,761 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 177 transitions, 2136 flow [2023-11-06 22:39:46,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:46,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:46,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:46,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:46,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:46,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 518167534, now seen corresponding path program 14 times [2023-11-06 22:39:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744624194] [2023-11-06 22:39:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:47,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:47,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744624194] [2023-11-06 22:39:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744624194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260703127] [2023-11-06 22:39:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:47,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:47,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:47,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:39:47,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:47,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:47,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:47,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:47,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260703127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:47,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:47,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145115341] [2023-11-06 22:39:47,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:47,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:47,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:48,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:48,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 177 transitions, 2136 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:48,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:48,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:48,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:49,759 INFO L124 PetriNetUnfolderBase]: 555/1163 cut-off events. [2023-11-06 22:39:49,760 INFO L125 PetriNetUnfolderBase]: For 22224/22224 co-relation queries the response was YES. [2023-11-06 22:39:49,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 1163 events. 555/1163 cut-off events. For 22224/22224 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7024 event pairs, 88 based on Foata normal form. 7/1170 useless extension candidates. Maximal degree in co-relation 7917. Up to 646 conditions per place. [2023-11-06 22:39:49,779 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 157 selfloop transitions, 119 changer transitions 24/300 dead transitions. [2023-11-06 22:39:49,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 300 transitions, 3682 flow [2023-11-06 22:39:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:39:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:39:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2436 transitions. [2023-11-06 22:39:49,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193492855913238 [2023-11-06 22:39:49,784 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2436 transitions. [2023-11-06 22:39:49,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2436 transitions. [2023-11-06 22:39:49,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:49,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2436 transitions. [2023-11-06 22:39:49,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.83783783783784) internal successors, (2436), 37 states have internal predecessors, (2436), 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) [2023-11-06 22:39:49,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 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) [2023-11-06 22:39:49,801 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 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) [2023-11-06 22:39:49,801 INFO L175 Difference]: Start difference. First operand has 184 places, 177 transitions, 2136 flow. Second operand 37 states and 2436 transitions. [2023-11-06 22:39:49,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 300 transitions, 3682 flow [2023-11-06 22:39:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 300 transitions, 3414 flow, removed 78 selfloop flow, removed 22 redundant places. [2023-11-06 22:39:49,882 INFO L231 Difference]: Finished difference. Result has 204 places, 196 transitions, 2764 flow [2023-11-06 22:39:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2764, PETRI_PLACES=204, PETRI_TRANSITIONS=196} [2023-11-06 22:39:49,883 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-11-06 22:39:49,883 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 196 transitions, 2764 flow [2023-11-06 22:39:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:49,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:49,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:50,084 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:50,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash 444016774, now seen corresponding path program 15 times [2023-11-06 22:39:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:50,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133467874] [2023-11-06 22:39:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:50,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:50,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133467874] [2023-11-06 22:39:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133467874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452354378] [2023-11-06 22:39:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:50,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:50,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:50,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:50,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:39:50,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:39:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:50,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:50,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:50,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452354378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:51,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:51,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456907003] [2023-11-06 22:39:51,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:51,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 196 transitions, 2764 flow. Second operand has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:53,013 INFO L124 PetriNetUnfolderBase]: 562/1140 cut-off events. [2023-11-06 22:39:53,013 INFO L125 PetriNetUnfolderBase]: For 23541/23541 co-relation queries the response was YES. [2023-11-06 22:39:53,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8584 conditions, 1140 events. 562/1140 cut-off events. For 23541/23541 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6660 event pairs, 88 based on Foata normal form. 7/1147 useless extension candidates. Maximal degree in co-relation 8291. Up to 644 conditions per place. [2023-11-06 22:39:53,029 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 143 selfloop transitions, 123 changer transitions 36/302 dead transitions. [2023-11-06 22:39:53,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 302 transitions, 3989 flow [2023-11-06 22:39:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:39:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:39:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2629 transitions. [2023-11-06 22:39:53,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41863057324840763 [2023-11-06 22:39:53,034 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2629 transitions. [2023-11-06 22:39:53,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2629 transitions. [2023-11-06 22:39:53,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:53,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2629 transitions. [2023-11-06 22:39:53,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 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) [2023-11-06 22:39:53,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:39:53,050 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:39:53,051 INFO L175 Difference]: Start difference. First operand has 204 places, 196 transitions, 2764 flow. Second operand 40 states and 2629 transitions. [2023-11-06 22:39:53,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 302 transitions, 3989 flow [2023-11-06 22:39:53,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 302 transitions, 3325 flow, removed 279 selfloop flow, removed 18 redundant places. [2023-11-06 22:39:53,158 INFO L231 Difference]: Finished difference. Result has 228 places, 199 transitions, 2554 flow [2023-11-06 22:39:53,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2554, PETRI_PLACES=228, PETRI_TRANSITIONS=199} [2023-11-06 22:39:53,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-11-06 22:39:53,159 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 199 transitions, 2554 flow [2023-11-06 22:39:53,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:53,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:53,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:53,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:53,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:39:53,366 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:53,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:53,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1714929842, now seen corresponding path program 16 times [2023-11-06 22:39:53,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:53,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072059860] [2023-11-06 22:39:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:53,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:53,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:53,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072059860] [2023-11-06 22:39:53,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072059860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:53,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971559211] [2023-11-06 22:39:53,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:53,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:53,600 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:53,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:39:53,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:53,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:53,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:53,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:54,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971559211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:54,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:54,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:54,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457140069] [2023-11-06 22:39:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:54,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:54,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:54,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:54,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 199 transitions, 2554 flow. Second operand has 25 states, 25 states have (on average 62.8) internal successors, (1570), 25 states have internal predecessors, (1570), 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) [2023-11-06 22:39:54,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:54,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:55,741 INFO L124 PetriNetUnfolderBase]: 556/1133 cut-off events. [2023-11-06 22:39:55,741 INFO L125 PetriNetUnfolderBase]: For 18730/18730 co-relation queries the response was YES. [2023-11-06 22:39:55,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8169 conditions, 1133 events. 556/1133 cut-off events. For 18730/18730 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6584 event pairs, 106 based on Foata normal form. 3/1136 useless extension candidates. Maximal degree in co-relation 8038. Up to 903 conditions per place. [2023-11-06 22:39:55,759 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 202 selfloop transitions, 43 changer transitions 18/263 dead transitions. [2023-11-06 22:39:55,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 263 transitions, 3581 flow [2023-11-06 22:39:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:39:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:39:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1325 transitions. [2023-11-06 22:39:55,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-11-06 22:39:55,763 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1325 transitions. [2023-11-06 22:39:55,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1325 transitions. [2023-11-06 22:39:55,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:55,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1325 transitions. [2023-11-06 22:39:55,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.25) internal successors, (1325), 20 states have internal predecessors, (1325), 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) [2023-11-06 22:39:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 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) [2023-11-06 22:39:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 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) [2023-11-06 22:39:55,771 INFO L175 Difference]: Start difference. First operand has 228 places, 199 transitions, 2554 flow. Second operand 20 states and 1325 transitions. [2023-11-06 22:39:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 263 transitions, 3581 flow [2023-11-06 22:39:55,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 263 transitions, 3264 flow, removed 53 selfloop flow, removed 30 redundant places. [2023-11-06 22:39:55,867 INFO L231 Difference]: Finished difference. Result has 217 places, 204 transitions, 2494 flow [2023-11-06 22:39:55,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2494, PETRI_PLACES=217, PETRI_TRANSITIONS=204} [2023-11-06 22:39:55,868 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-11-06 22:39:55,868 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 204 transitions, 2494 flow [2023-11-06 22:39:55,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.8) internal successors, (1570), 25 states have internal predecessors, (1570), 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) [2023-11-06 22:39:55,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:55,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:55,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:56,070 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:56,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 70777632, now seen corresponding path program 17 times [2023-11-06 22:39:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:56,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070097794] [2023-11-06 22:39:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070097794] [2023-11-06 22:39:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070097794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576640629] [2023-11-06 22:39:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:56,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:56,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:39:56,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:39:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:56,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:39:56,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:56,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576640629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:56,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:56,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405313661] [2023-11-06 22:39:56,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:56,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:57,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 204 transitions, 2494 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:58,215 INFO L124 PetriNetUnfolderBase]: 585/1232 cut-off events. [2023-11-06 22:39:58,215 INFO L125 PetriNetUnfolderBase]: For 21810/21810 co-relation queries the response was YES. [2023-11-06 22:39:58,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8665 conditions, 1232 events. 585/1232 cut-off events. For 21810/21810 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7546 event pairs, 58 based on Foata normal form. 3/1235 useless extension candidates. Maximal degree in co-relation 8532. Up to 725 conditions per place. [2023-11-06 22:39:58,260 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 186 selfloop transitions, 75 changer transitions 35/296 dead transitions. [2023-11-06 22:39:58,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 296 transitions, 3972 flow [2023-11-06 22:39:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:39:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:39:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1761 transitions. [2023-11-06 22:39:58,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154281670205237 [2023-11-06 22:39:58,265 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1761 transitions. [2023-11-06 22:39:58,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1761 transitions. [2023-11-06 22:39:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:58,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1761 transitions. [2023-11-06 22:39:58,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.22222222222223) internal successors, (1761), 27 states have internal predecessors, (1761), 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) [2023-11-06 22:39:58,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:39:58,275 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:39:58,275 INFO L175 Difference]: Start difference. First operand has 217 places, 204 transitions, 2494 flow. Second operand 27 states and 1761 transitions. [2023-11-06 22:39:58,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 296 transitions, 3972 flow [2023-11-06 22:39:58,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 296 transitions, 3728 flow, removed 55 selfloop flow, removed 19 redundant places. [2023-11-06 22:39:58,402 INFO L231 Difference]: Finished difference. Result has 229 places, 227 transitions, 2960 flow [2023-11-06 22:39:58,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2960, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2023-11-06 22:39:58,403 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2023-11-06 22:39:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 2960 flow [2023-11-06 22:39:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:39:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:58,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:58,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:58,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:58,610 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:39:58,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:58,610 INFO L85 PathProgramCache]: Analyzing trace with hash -133600602, now seen corresponding path program 18 times [2023-11-06 22:39:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789558070] [2023-11-06 22:39:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:58,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:58,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789558070] [2023-11-06 22:39:58,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789558070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:58,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34968509] [2023-11-06 22:39:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:39:58,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:58,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:39:58,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:39:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:58,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:39:58,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:59,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34968509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:59,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:39:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334802894] [2023-11-06 22:39:59,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:39:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:39:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:39:59,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:39:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 2960 flow. Second operand has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:39:59,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:59,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:39:59,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:01,478 INFO L124 PetriNetUnfolderBase]: 611/1301 cut-off events. [2023-11-06 22:40:01,478 INFO L125 PetriNetUnfolderBase]: For 29503/29503 co-relation queries the response was YES. [2023-11-06 22:40:01,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9580 conditions, 1301 events. 611/1301 cut-off events. For 29503/29503 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8167 event pairs, 103 based on Foata normal form. 4/1305 useless extension candidates. Maximal degree in co-relation 9441. Up to 1023 conditions per place. [2023-11-06 22:40:01,500 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 249 selfloop transitions, 56 changer transitions 17/322 dead transitions. [2023-11-06 22:40:01,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4574 flow [2023-11-06 22:40:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:40:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:40:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1845 transitions. [2023-11-06 22:40:01,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196997270245678 [2023-11-06 22:40:01,504 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1845 transitions. [2023-11-06 22:40:01,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1845 transitions. [2023-11-06 22:40:01,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:01,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1845 transitions. [2023-11-06 22:40:01,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 65.89285714285714) internal successors, (1845), 28 states have internal predecessors, (1845), 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) [2023-11-06 22:40:01,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 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) [2023-11-06 22:40:01,517 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 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) [2023-11-06 22:40:01,517 INFO L175 Difference]: Start difference. First operand has 229 places, 227 transitions, 2960 flow. Second operand 28 states and 1845 transitions. [2023-11-06 22:40:01,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4574 flow [2023-11-06 22:40:01,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 322 transitions, 3845 flow, removed 341 selfloop flow, removed 13 redundant places. [2023-11-06 22:40:01,665 INFO L231 Difference]: Finished difference. Result has 240 places, 243 transitions, 2950 flow [2023-11-06 22:40:01,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2950, PETRI_PLACES=240, PETRI_TRANSITIONS=243} [2023-11-06 22:40:01,666 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2023-11-06 22:40:01,666 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 243 transitions, 2950 flow [2023-11-06 22:40:01,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:40:01,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:01,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:01,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:01,873 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:01,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -59449842, now seen corresponding path program 19 times [2023-11-06 22:40:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:01,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705775250] [2023-11-06 22:40:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:02,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:02,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705775250] [2023-11-06 22:40:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705775250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:02,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084022545] [2023-11-06 22:40:02,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:40:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:02,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:40:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:02,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:40:02,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:02,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:02,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084022545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:02,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:40:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325964863] [2023-11-06 22:40:02,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:02,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:03,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:03,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 243 transitions, 2950 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:40:03,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:04,357 INFO L124 PetriNetUnfolderBase]: 617/1314 cut-off events. [2023-11-06 22:40:04,358 INFO L125 PetriNetUnfolderBase]: For 29255/29255 co-relation queries the response was YES. [2023-11-06 22:40:04,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9323 conditions, 1314 events. 617/1314 cut-off events. For 29255/29255 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8249 event pairs, 111 based on Foata normal form. 2/1316 useless extension candidates. Maximal degree in co-relation 9211. Up to 1084 conditions per place. [2023-11-06 22:40:04,375 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 232 selfloop transitions, 47 changer transitions 28/307 dead transitions. [2023-11-06 22:40:04,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 307 transitions, 3928 flow [2023-11-06 22:40:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:40:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:40:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1516 transitions. [2023-11-06 22:40:04,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198283024093049 [2023-11-06 22:40:04,379 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1516 transitions. [2023-11-06 22:40:04,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1516 transitions. [2023-11-06 22:40:04,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:04,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1516 transitions. [2023-11-06 22:40:04,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.91304347826087) internal successors, (1516), 23 states have internal predecessors, (1516), 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) [2023-11-06 22:40:04,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:04,387 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:04,387 INFO L175 Difference]: Start difference. First operand has 240 places, 243 transitions, 2950 flow. Second operand 23 states and 1516 transitions. [2023-11-06 22:40:04,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 307 transitions, 3928 flow [2023-11-06 22:40:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 307 transitions, 3544 flow, removed 152 selfloop flow, removed 17 redundant places. [2023-11-06 22:40:04,529 INFO L231 Difference]: Finished difference. Result has 244 places, 239 transitions, 2726 flow [2023-11-06 22:40:04,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2726, PETRI_PLACES=244, PETRI_TRANSITIONS=239} [2023-11-06 22:40:04,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2023-11-06 22:40:04,530 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 239 transitions, 2726 flow [2023-11-06 22:40:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:40:04,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:04,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:04,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:04,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:04,737 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:04,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:04,737 INFO L85 PathProgramCache]: Analyzing trace with hash -4562420, now seen corresponding path program 20 times [2023-11-06 22:40:04,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:04,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230222646] [2023-11-06 22:40:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:04,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:04,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230222646] [2023-11-06 22:40:04,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230222646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:04,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348252760] [2023-11-06 22:40:04,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:04,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:04,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:04,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:04,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:40:05,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:05,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:40:05,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:05,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:05,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348252760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:05,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:05,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:40:05,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253376646] [2023-11-06 22:40:05,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:05,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:05,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:05,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:05,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:05,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:05,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 239 transitions, 2726 flow. Second operand has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:40:05,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:05,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:05,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:07,393 INFO L124 PetriNetUnfolderBase]: 667/1446 cut-off events. [2023-11-06 22:40:07,393 INFO L125 PetriNetUnfolderBase]: For 36164/36164 co-relation queries the response was YES. [2023-11-06 22:40:07,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10234 conditions, 1446 events. 667/1446 cut-off events. For 36164/36164 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9436 event pairs, 119 based on Foata normal form. 6/1446 useless extension candidates. Maximal degree in co-relation 10103. Up to 1101 conditions per place. [2023-11-06 22:40:07,408 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 233 selfloop transitions, 78 changer transitions 31/342 dead transitions. [2023-11-06 22:40:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 342 transitions, 4462 flow [2023-11-06 22:40:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:40:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:40:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2039 transitions. [2023-11-06 22:40:07,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41894390795151015 [2023-11-06 22:40:07,413 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2039 transitions. [2023-11-06 22:40:07,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2039 transitions. [2023-11-06 22:40:07,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:07,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2039 transitions. [2023-11-06 22:40:07,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.7741935483871) internal successors, (2039), 31 states have internal predecessors, (2039), 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) [2023-11-06 22:40:07,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 157.0) internal successors, (5024), 32 states have internal predecessors, (5024), 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) [2023-11-06 22:40:07,424 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 157.0) internal successors, (5024), 32 states have internal predecessors, (5024), 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) [2023-11-06 22:40:07,424 INFO L175 Difference]: Start difference. First operand has 244 places, 239 transitions, 2726 flow. Second operand 31 states and 2039 transitions. [2023-11-06 22:40:07,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 342 transitions, 4462 flow [2023-11-06 22:40:07,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 342 transitions, 4298 flow, removed 33 selfloop flow, removed 17 redundant places. [2023-11-06 22:40:07,602 INFO L231 Difference]: Finished difference. Result has 261 places, 262 transitions, 3305 flow [2023-11-06 22:40:07,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3305, PETRI_PLACES=261, PETRI_TRANSITIONS=262} [2023-11-06 22:40:07,603 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 241 predicate places. [2023-11-06 22:40:07,604 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 262 transitions, 3305 flow [2023-11-06 22:40:07,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.84) internal successors, (1571), 25 states have internal predecessors, (1571), 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) [2023-11-06 22:40:07,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:07,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:07,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:07,811 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:07,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 69588340, now seen corresponding path program 21 times [2023-11-06 22:40:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:07,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40728770] [2023-11-06 22:40:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:07,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:08,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:08,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40728770] [2023-11-06 22:40:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40728770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:08,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434649347] [2023-11-06 22:40:08,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:08,040 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:08,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:40:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:40:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:08,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:40:08,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:08,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434649347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:08,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:08,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 22:40:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149499437] [2023-11-06 22:40:08,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:08,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:08,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:09,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:09,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 262 transitions, 3305 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:40:09,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:09,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:10,222 INFO L124 PetriNetUnfolderBase]: 638/1384 cut-off events. [2023-11-06 22:40:10,222 INFO L125 PetriNetUnfolderBase]: For 39896/39896 co-relation queries the response was YES. [2023-11-06 22:40:10,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 1384 events. 638/1384 cut-off events. For 39896/39896 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8944 event pairs, 121 based on Foata normal form. 3/1385 useless extension candidates. Maximal degree in co-relation 9911. Up to 1121 conditions per place. [2023-11-06 22:40:10,240 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 224 selfloop transitions, 67 changer transitions 15/306 dead transitions. [2023-11-06 22:40:10,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 306 transitions, 4093 flow [2023-11-06 22:40:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:40:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:40:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1507 transitions. [2023-11-06 22:40:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41733591802824704 [2023-11-06 22:40:10,250 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1507 transitions. [2023-11-06 22:40:10,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1507 transitions. [2023-11-06 22:40:10,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:10,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1507 transitions. [2023-11-06 22:40:10,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.52173913043478) internal successors, (1507), 23 states have internal predecessors, (1507), 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) [2023-11-06 22:40:10,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:10,258 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:10,258 INFO L175 Difference]: Start difference. First operand has 261 places, 262 transitions, 3305 flow. Second operand 23 states and 1507 transitions. [2023-11-06 22:40:10,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 306 transitions, 4093 flow [2023-11-06 22:40:10,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 306 transitions, 3733 flow, removed 156 selfloop flow, removed 11 redundant places. [2023-11-06 22:40:10,506 INFO L231 Difference]: Finished difference. Result has 267 places, 255 transitions, 3062 flow [2023-11-06 22:40:10,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3062, PETRI_PLACES=267, PETRI_TRANSITIONS=255} [2023-11-06 22:40:10,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 247 predicate places. [2023-11-06 22:40:10,507 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 255 transitions, 3062 flow [2023-11-06 22:40:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 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) [2023-11-06 22:40:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:10,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:10,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:40:10,714 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:10,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1871136642, now seen corresponding path program 22 times [2023-11-06 22:40:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562271840] [2023-11-06 22:40:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562271840] [2023-11-06 22:40:10,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562271840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680597467] [2023-11-06 22:40:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:40:10,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:10,952 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:10,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:40:11,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:40:11,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:11,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:11,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:11,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680597467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:11,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795637331] [2023-11-06 22:40:11,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:11,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:11,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 255 transitions, 3062 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:11,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:11,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:12,417 INFO L124 PetriNetUnfolderBase]: 678/1451 cut-off events. [2023-11-06 22:40:12,417 INFO L125 PetriNetUnfolderBase]: For 42426/42426 co-relation queries the response was YES. [2023-11-06 22:40:12,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10827 conditions, 1451 events. 678/1451 cut-off events. For 42426/42426 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9462 event pairs, 32 based on Foata normal form. 4/1453 useless extension candidates. Maximal degree in co-relation 10689. Up to 546 conditions per place. [2023-11-06 22:40:12,436 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 153 selfloop transitions, 140 changer transitions 45/338 dead transitions. [2023-11-06 22:40:12,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 338 transitions, 4475 flow [2023-11-06 22:40:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:40:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:40:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1466 transitions. [2023-11-06 22:40:12,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42443543717429066 [2023-11-06 22:40:12,439 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1466 transitions. [2023-11-06 22:40:12,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1466 transitions. [2023-11-06 22:40:12,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:12,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1466 transitions. [2023-11-06 22:40:12,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.63636363636364) internal successors, (1466), 22 states have internal predecessors, (1466), 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) [2023-11-06 22:40:12,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 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) [2023-11-06 22:40:12,447 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 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) [2023-11-06 22:40:12,447 INFO L175 Difference]: Start difference. First operand has 267 places, 255 transitions, 3062 flow. Second operand 22 states and 1466 transitions. [2023-11-06 22:40:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 338 transitions, 4475 flow [2023-11-06 22:40:12,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 338 transitions, 4239 flow, removed 47 selfloop flow, removed 21 redundant places. [2023-11-06 22:40:12,682 INFO L231 Difference]: Finished difference. Result has 269 places, 258 transitions, 3426 flow [2023-11-06 22:40:12,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3426, PETRI_PLACES=269, PETRI_TRANSITIONS=258} [2023-11-06 22:40:12,683 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 249 predicate places. [2023-11-06 22:40:12,683 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 258 transitions, 3426 flow [2023-11-06 22:40:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:12,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:12,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:12,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:40:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:40:12,884 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:12,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1510973447, now seen corresponding path program 23 times [2023-11-06 22:40:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:12,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425427419] [2023-11-06 22:40:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425427419] [2023-11-06 22:40:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425427419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046782329] [2023-11-06 22:40:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:40:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:13,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:40:13,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:40:13,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:13,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:40:13,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:13,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046782329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:14,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:14,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-11-06 22:40:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896862826] [2023-11-06 22:40:14,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:40:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:40:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:40:14,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:14,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 258 transitions, 3426 flow. Second operand has 28 states, 28 states have (on average 62.67857142857143) internal successors, (1755), 28 states have internal predecessors, (1755), 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) [2023-11-06 22:40:14,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:14,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:16,105 INFO L124 PetriNetUnfolderBase]: 762/1587 cut-off events. [2023-11-06 22:40:16,106 INFO L125 PetriNetUnfolderBase]: For 42408/42408 co-relation queries the response was YES. [2023-11-06 22:40:16,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11943 conditions, 1587 events. 762/1587 cut-off events. For 42408/42408 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10353 event pairs, 64 based on Foata normal form. 2/1589 useless extension candidates. Maximal degree in co-relation 11797. Up to 1142 conditions per place. [2023-11-06 22:40:16,121 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 223 selfloop transitions, 137 changer transitions 14/374 dead transitions. [2023-11-06 22:40:16,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 374 transitions, 5075 flow [2023-11-06 22:40:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:40:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:40:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1907 transitions. [2023-11-06 22:40:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188447177685043 [2023-11-06 22:40:16,124 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1907 transitions. [2023-11-06 22:40:16,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1907 transitions. [2023-11-06 22:40:16,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:16,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1907 transitions. [2023-11-06 22:40:16,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.75862068965517) internal successors, (1907), 29 states have internal predecessors, (1907), 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) [2023-11-06 22:40:16,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 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) [2023-11-06 22:40:16,133 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 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) [2023-11-06 22:40:16,133 INFO L175 Difference]: Start difference. First operand has 269 places, 258 transitions, 3426 flow. Second operand 29 states and 1907 transitions. [2023-11-06 22:40:16,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 374 transitions, 5075 flow [2023-11-06 22:40:16,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 374 transitions, 4775 flow, removed 55 selfloop flow, removed 17 redundant places. [2023-11-06 22:40:16,327 INFO L231 Difference]: Finished difference. Result has 273 places, 302 transitions, 4116 flow [2023-11-06 22:40:16,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4116, PETRI_PLACES=273, PETRI_TRANSITIONS=302} [2023-11-06 22:40:16,328 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 253 predicate places. [2023-11-06 22:40:16,328 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 302 transitions, 4116 flow [2023-11-06 22:40:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.67857142857143) internal successors, (1755), 28 states have internal predecessors, (1755), 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) [2023-11-06 22:40:16,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:16,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:16,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:40:16,529 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:16,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1464524068, now seen corresponding path program 24 times [2023-11-06 22:40:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796330817] [2023-11-06 22:40:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796330817] [2023-11-06 22:40:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796330817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456670342] [2023-11-06 22:40:16,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:40:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:16,760 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:16,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:40:16,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:40:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:16,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:16,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:17,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456670342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:17,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000050443] [2023-11-06 22:40:17,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:17,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:17,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:17,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 302 transitions, 4116 flow. Second operand has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:17,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:17,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:17,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:18,709 INFO L124 PetriNetUnfolderBase]: 863/1820 cut-off events. [2023-11-06 22:40:18,709 INFO L125 PetriNetUnfolderBase]: For 43781/43781 co-relation queries the response was YES. [2023-11-06 22:40:18,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13992 conditions, 1820 events. 863/1820 cut-off events. For 43781/43781 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12446 event pairs, 40 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 13868. Up to 577 conditions per place. [2023-11-06 22:40:18,730 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 198 selfloop transitions, 201 changer transitions 23/422 dead transitions. [2023-11-06 22:40:18,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 422 transitions, 6424 flow [2023-11-06 22:40:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:40:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:40:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1867 transitions. [2023-11-06 22:40:18,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247042766151046 [2023-11-06 22:40:18,735 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1867 transitions. [2023-11-06 22:40:18,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1867 transitions. [2023-11-06 22:40:18,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:18,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1867 transitions. [2023-11-06 22:40:18,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 66.67857142857143) internal successors, (1867), 28 states have internal predecessors, (1867), 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) [2023-11-06 22:40:18,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 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) [2023-11-06 22:40:18,744 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 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) [2023-11-06 22:40:18,745 INFO L175 Difference]: Start difference. First operand has 273 places, 302 transitions, 4116 flow. Second operand 28 states and 1867 transitions. [2023-11-06 22:40:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 422 transitions, 6424 flow [2023-11-06 22:40:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 422 transitions, 6077 flow, removed 45 selfloop flow, removed 17 redundant places. [2023-11-06 22:40:19,024 INFO L231 Difference]: Finished difference. Result has 289 places, 323 transitions, 4909 flow [2023-11-06 22:40:19,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4909, PETRI_PLACES=289, PETRI_TRANSITIONS=323} [2023-11-06 22:40:19,025 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 269 predicate places. [2023-11-06 22:40:19,026 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 323 transitions, 4909 flow [2023-11-06 22:40:19,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:19,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:19,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:19,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:40:19,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:19,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash -744570926, now seen corresponding path program 25 times [2023-11-06 22:40:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897433928] [2023-11-06 22:40:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:19,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:19,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897433928] [2023-11-06 22:40:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897433928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:19,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847718783] [2023-11-06 22:40:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:40:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:19,452 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:19,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:40:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:19,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:19,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:19,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847718783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:19,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:19,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268639733] [2023-11-06 22:40:19,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:19,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:19,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:20,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 323 transitions, 4909 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:20,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:20,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:20,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:21,313 INFO L124 PetriNetUnfolderBase]: 847/1787 cut-off events. [2023-11-06 22:40:21,313 INFO L125 PetriNetUnfolderBase]: For 45170/45170 co-relation queries the response was YES. [2023-11-06 22:40:21,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14536 conditions, 1787 events. 847/1787 cut-off events. For 45170/45170 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12149 event pairs, 36 based on Foata normal form. 3/1790 useless extension candidates. Maximal degree in co-relation 14388. Up to 686 conditions per place. [2023-11-06 22:40:21,336 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 174 selfloop transitions, 173 changer transitions 59/406 dead transitions. [2023-11-06 22:40:21,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 406 transitions, 6593 flow [2023-11-06 22:40:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:40:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:40:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1658 transitions. [2023-11-06 22:40:21,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242038216560507 [2023-11-06 22:40:21,339 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1658 transitions. [2023-11-06 22:40:21,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1658 transitions. [2023-11-06 22:40:21,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:21,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1658 transitions. [2023-11-06 22:40:21,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.32) internal successors, (1658), 25 states have internal predecessors, (1658), 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) [2023-11-06 22:40:21,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 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) [2023-11-06 22:40:21,348 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 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) [2023-11-06 22:40:21,348 INFO L175 Difference]: Start difference. First operand has 289 places, 323 transitions, 4909 flow. Second operand 25 states and 1658 transitions. [2023-11-06 22:40:21,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 406 transitions, 6593 flow [2023-11-06 22:40:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 406 transitions, 5905 flow, removed 230 selfloop flow, removed 23 redundant places. [2023-11-06 22:40:21,637 INFO L231 Difference]: Finished difference. Result has 296 places, 305 transitions, 4646 flow [2023-11-06 22:40:21,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4646, PETRI_PLACES=296, PETRI_TRANSITIONS=305} [2023-11-06 22:40:21,638 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-11-06 22:40:21,638 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 305 transitions, 4646 flow [2023-11-06 22:40:21,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:21,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:21,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:21,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:40:21,839 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:21,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1436818438, now seen corresponding path program 26 times [2023-11-06 22:40:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:21,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816334805] [2023-11-06 22:40:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816334805] [2023-11-06 22:40:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816334805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796609967] [2023-11-06 22:40:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:22,077 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:22,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:40:22,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:22,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:22,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:22,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796609967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:22,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:22,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809518662] [2023-11-06 22:40:22,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:22,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:22,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 305 transitions, 4646 flow. Second operand has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:22,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:22,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:22,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:24,078 INFO L124 PetriNetUnfolderBase]: 757/1610 cut-off events. [2023-11-06 22:40:24,078 INFO L125 PetriNetUnfolderBase]: For 44277/44277 co-relation queries the response was YES. [2023-11-06 22:40:24,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12960 conditions, 1610 events. 757/1610 cut-off events. For 44277/44277 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10686 event pairs, 30 based on Foata normal form. 4/1614 useless extension candidates. Maximal degree in co-relation 12809. Up to 562 conditions per place. [2023-11-06 22:40:24,102 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 170 selfloop transitions, 190 changer transitions 12/372 dead transitions. [2023-11-06 22:40:24,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 372 transitions, 5921 flow [2023-11-06 22:40:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:40:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:40:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1718 transitions. [2023-11-06 22:40:24,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42087212150906417 [2023-11-06 22:40:24,105 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1718 transitions. [2023-11-06 22:40:24,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1718 transitions. [2023-11-06 22:40:24,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:24,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1718 transitions. [2023-11-06 22:40:24,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.07692307692308) internal successors, (1718), 26 states have internal predecessors, (1718), 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) [2023-11-06 22:40:24,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 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) [2023-11-06 22:40:24,111 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 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) [2023-11-06 22:40:24,111 INFO L175 Difference]: Start difference. First operand has 296 places, 305 transitions, 4646 flow. Second operand 26 states and 1718 transitions. [2023-11-06 22:40:24,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 372 transitions, 5921 flow [2023-11-06 22:40:24,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 372 transitions, 5306 flow, removed 81 selfloop flow, removed 28 redundant places. [2023-11-06 22:40:24,331 INFO L231 Difference]: Finished difference. Result has 284 places, 305 transitions, 4630 flow [2023-11-06 22:40:24,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4630, PETRI_PLACES=284, PETRI_TRANSITIONS=305} [2023-11-06 22:40:24,332 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 264 predicate places. [2023-11-06 22:40:24,332 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 305 transitions, 4630 flow [2023-11-06 22:40:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:24,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:24,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:24,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-06 22:40:24,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:40:24,539 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:24,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1197335308, now seen corresponding path program 27 times [2023-11-06 22:40:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:24,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590552593] [2023-11-06 22:40:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:24,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:24,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590552593] [2023-11-06 22:40:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590552593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487261711] [2023-11-06 22:40:24,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:24,764 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:24,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:40:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:40:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:24,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:24,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:25,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487261711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:25,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:25,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073634472] [2023-11-06 22:40:25,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:25,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:25,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:25,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 305 transitions, 4630 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:25,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:25,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:26,631 INFO L124 PetriNetUnfolderBase]: 775/1631 cut-off events. [2023-11-06 22:40:26,632 INFO L125 PetriNetUnfolderBase]: For 38114/38114 co-relation queries the response was YES. [2023-11-06 22:40:26,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12997 conditions, 1631 events. 775/1631 cut-off events. For 38114/38114 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10767 event pairs, 32 based on Foata normal form. 6/1637 useless extension candidates. Maximal degree in co-relation 12849. Up to 562 conditions per place. [2023-11-06 22:40:26,656 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 170 selfloop transitions, 165 changer transitions 56/391 dead transitions. [2023-11-06 22:40:26,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 391 transitions, 6286 flow [2023-11-06 22:40:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:40:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:40:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1654 transitions. [2023-11-06 22:40:26,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214012738853503 [2023-11-06 22:40:26,664 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1654 transitions. [2023-11-06 22:40:26,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1654 transitions. [2023-11-06 22:40:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1654 transitions. [2023-11-06 22:40:26,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.16) internal successors, (1654), 25 states have internal predecessors, (1654), 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) [2023-11-06 22:40:26,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 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) [2023-11-06 22:40:26,672 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 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) [2023-11-06 22:40:26,672 INFO L175 Difference]: Start difference. First operand has 284 places, 305 transitions, 4630 flow. Second operand 25 states and 1654 transitions. [2023-11-06 22:40:26,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 391 transitions, 6286 flow [2023-11-06 22:40:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 5793 flow, removed 91 selfloop flow, removed 19 redundant places. [2023-11-06 22:40:27,005 INFO L231 Difference]: Finished difference. Result has 293 places, 289 transitions, 4352 flow [2023-11-06 22:40:27,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4203, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4352, PETRI_PLACES=293, PETRI_TRANSITIONS=289} [2023-11-06 22:40:27,006 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 273 predicate places. [2023-11-06 22:40:27,006 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 289 transitions, 4352 flow [2023-11-06 22:40:27,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:27,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:27,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:27,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:40:27,211 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:27,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1173703324, now seen corresponding path program 28 times [2023-11-06 22:40:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409802367] [2023-11-06 22:40:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:27,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409802367] [2023-11-06 22:40:27,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409802367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:27,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776871323] [2023-11-06 22:40:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:40:27,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:27,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:27,417 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:40:27,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:40:27,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:27,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:27,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:27,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776871323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:27,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:27,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:27,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138372809] [2023-11-06 22:40:27,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:28,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:28,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 289 transitions, 4352 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:28,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:28,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:28,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:29,344 INFO L124 PetriNetUnfolderBase]: 745/1560 cut-off events. [2023-11-06 22:40:29,344 INFO L125 PetriNetUnfolderBase]: For 39971/39971 co-relation queries the response was YES. [2023-11-06 22:40:29,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12711 conditions, 1560 events. 745/1560 cut-off events. For 39971/39971 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10070 event pairs, 67 based on Foata normal form. 5/1565 useless extension candidates. Maximal degree in co-relation 12618. Up to 652 conditions per place. [2023-11-06 22:40:29,361 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 214 selfloop transitions, 148 changer transitions 45/407 dead transitions. [2023-11-06 22:40:29,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 407 transitions, 6700 flow [2023-11-06 22:40:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:40:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:40:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1788 transitions. [2023-11-06 22:40:29,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42179759377211606 [2023-11-06 22:40:29,364 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1788 transitions. [2023-11-06 22:40:29,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1788 transitions. [2023-11-06 22:40:29,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:29,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1788 transitions. [2023-11-06 22:40:29,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 66.22222222222223) internal successors, (1788), 27 states have internal predecessors, (1788), 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) [2023-11-06 22:40:29,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:40:29,369 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:40:29,369 INFO L175 Difference]: Start difference. First operand has 293 places, 289 transitions, 4352 flow. Second operand 27 states and 1788 transitions. [2023-11-06 22:40:29,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 407 transitions, 6700 flow [2023-11-06 22:40:29,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 407 transitions, 6090 flow, removed 125 selfloop flow, removed 26 redundant places. [2023-11-06 22:40:29,567 INFO L231 Difference]: Finished difference. Result has 289 places, 297 transitions, 4569 flow [2023-11-06 22:40:29,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4569, PETRI_PLACES=289, PETRI_TRANSITIONS=297} [2023-11-06 22:40:29,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 269 predicate places. [2023-11-06 22:40:29,568 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 297 transitions, 4569 flow [2023-11-06 22:40:29,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:40:29,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:29,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:29,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:29,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:29,775 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:29,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1161940660, now seen corresponding path program 29 times [2023-11-06 22:40:29,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:29,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348417065] [2023-11-06 22:40:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348417065] [2023-11-06 22:40:30,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348417065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733056429] [2023-11-06 22:40:30,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:40:30,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:30,026 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:30,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:40:30,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:40:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:30,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:30,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:30,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733056429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:30,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 22:40:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952722073] [2023-11-06 22:40:30,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:30,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 297 transitions, 4569 flow. Second operand has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:32,587 INFO L124 PetriNetUnfolderBase]: 775/1626 cut-off events. [2023-11-06 22:40:32,588 INFO L125 PetriNetUnfolderBase]: For 47042/47042 co-relation queries the response was YES. [2023-11-06 22:40:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 1626 events. 775/1626 cut-off events. For 47042/47042 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10602 event pairs, 42 based on Foata normal form. 9/1635 useless extension candidates. Maximal degree in co-relation 13430. Up to 477 conditions per place. [2023-11-06 22:40:32,614 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 218 selfloop transitions, 198 changer transitions 19/435 dead transitions. [2023-11-06 22:40:32,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 435 transitions, 7233 flow [2023-11-06 22:40:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:40:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:40:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2357 transitions. [2023-11-06 22:40:32,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170205237084218 [2023-11-06 22:40:32,619 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2357 transitions. [2023-11-06 22:40:32,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2357 transitions. [2023-11-06 22:40:32,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:32,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2357 transitions. [2023-11-06 22:40:32,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.47222222222223) internal successors, (2357), 36 states have internal predecessors, (2357), 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) [2023-11-06 22:40:32,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 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) [2023-11-06 22:40:32,628 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 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) [2023-11-06 22:40:32,629 INFO L175 Difference]: Start difference. First operand has 289 places, 297 transitions, 4569 flow. Second operand 36 states and 2357 transitions. [2023-11-06 22:40:32,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 435 transitions, 7233 flow [2023-11-06 22:40:32,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 435 transitions, 6713 flow, removed 167 selfloop flow, removed 24 redundant places. [2023-11-06 22:40:32,966 INFO L231 Difference]: Finished difference. Result has 290 places, 338 transitions, 5719 flow [2023-11-06 22:40:32,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5719, PETRI_PLACES=290, PETRI_TRANSITIONS=338} [2023-11-06 22:40:32,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 270 predicate places. [2023-11-06 22:40:32,967 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 338 transitions, 5719 flow [2023-11-06 22:40:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:32,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:32,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:32,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:33,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:40:33,171 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:33,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 878919670, now seen corresponding path program 30 times [2023-11-06 22:40:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:33,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149203599] [2023-11-06 22:40:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:33,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149203599] [2023-11-06 22:40:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149203599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653782234] [2023-11-06 22:40:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:40:33,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:33,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:33,404 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:33,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:40:33,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:40:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:33,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:33,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:33,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653782234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:33,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:33,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 22:40:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762193292] [2023-11-06 22:40:33,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:34,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:34,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 338 transitions, 5719 flow. Second operand has 25 states, 25 states have (on average 62.72) internal successors, (1568), 25 states have internal predecessors, (1568), 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) [2023-11-06 22:40:34,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:35,644 INFO L124 PetriNetUnfolderBase]: 796/1640 cut-off events. [2023-11-06 22:40:35,645 INFO L125 PetriNetUnfolderBase]: For 44440/44440 co-relation queries the response was YES. [2023-11-06 22:40:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13948 conditions, 1640 events. 796/1640 cut-off events. For 44440/44440 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10511 event pairs, 58 based on Foata normal form. 13/1653 useless extension candidates. Maximal degree in co-relation 13858. Up to 519 conditions per place. [2023-11-06 22:40:35,661 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 214 selfloop transitions, 151 changer transitions 87/452 dead transitions. [2023-11-06 22:40:35,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 452 transitions, 7695 flow [2023-11-06 22:40:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:40:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:40:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2622 transitions. [2023-11-06 22:40:35,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417515923566879 [2023-11-06 22:40:35,667 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2622 transitions. [2023-11-06 22:40:35,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2622 transitions. [2023-11-06 22:40:35,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:35,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2622 transitions. [2023-11-06 22:40:35,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.55) internal successors, (2622), 40 states have internal predecessors, (2622), 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) [2023-11-06 22:40:35,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:40:35,678 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:40:35,679 INFO L175 Difference]: Start difference. First operand has 290 places, 338 transitions, 5719 flow. Second operand 40 states and 2622 transitions. [2023-11-06 22:40:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 452 transitions, 7695 flow [2023-11-06 22:40:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 452 transitions, 6657 flow, removed 434 selfloop flow, removed 26 redundant places. [2023-11-06 22:40:36,010 INFO L231 Difference]: Finished difference. Result has 305 places, 299 transitions, 4730 flow [2023-11-06 22:40:36,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4730, PETRI_PLACES=305, PETRI_TRANSITIONS=299} [2023-11-06 22:40:36,011 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2023-11-06 22:40:36,012 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 299 transitions, 4730 flow [2023-11-06 22:40:36,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.72) internal successors, (1568), 25 states have internal predecessors, (1568), 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) [2023-11-06 22:40:36,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:36,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:36,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:40:36,213 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:36,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1488156052, now seen corresponding path program 31 times [2023-11-06 22:40:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:36,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412449839] [2023-11-06 22:40:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:36,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412449839] [2023-11-06 22:40:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412449839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660180829] [2023-11-06 22:40:36,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:40:36,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:36,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:36,455 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:36,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:40:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:36,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:36,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:36,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:36,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660180829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:36,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:36,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:40:36,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525554475] [2023-11-06 22:40:36,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:36,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:40:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:40:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:40:37,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:37,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 299 transitions, 4730 flow. Second operand has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:37,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:37,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:37,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:38,175 INFO L124 PetriNetUnfolderBase]: 627/1314 cut-off events. [2023-11-06 22:40:38,175 INFO L125 PetriNetUnfolderBase]: For 15220/15220 co-relation queries the response was YES. [2023-11-06 22:40:38,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9554 conditions, 1314 events. 627/1314 cut-off events. For 15220/15220 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8047 event pairs, 52 based on Foata normal form. 2/1316 useless extension candidates. Maximal degree in co-relation 9467. Up to 617 conditions per place. [2023-11-06 22:40:38,192 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 212 selfloop transitions, 148 changer transitions 23/383 dead transitions. [2023-11-06 22:40:38,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 383 transitions, 6249 flow [2023-11-06 22:40:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:40:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:40:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1774 transitions. [2023-11-06 22:40:38,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184949280490682 [2023-11-06 22:40:38,195 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1774 transitions. [2023-11-06 22:40:38,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1774 transitions. [2023-11-06 22:40:38,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:38,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1774 transitions. [2023-11-06 22:40:38,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.70370370370371) internal successors, (1774), 27 states have internal predecessors, (1774), 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) [2023-11-06 22:40:38,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:40:38,200 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 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) [2023-11-06 22:40:38,200 INFO L175 Difference]: Start difference. First operand has 305 places, 299 transitions, 4730 flow. Second operand 27 states and 1774 transitions. [2023-11-06 22:40:38,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 383 transitions, 6249 flow [2023-11-06 22:40:38,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 383 transitions, 5691 flow, removed 91 selfloop flow, removed 35 redundant places. [2023-11-06 22:40:38,313 INFO L231 Difference]: Finished difference. Result has 286 places, 301 transitions, 4661 flow [2023-11-06 22:40:38,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4661, PETRI_PLACES=286, PETRI_TRANSITIONS=301} [2023-11-06 22:40:38,314 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 266 predicate places. [2023-11-06 22:40:38,314 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 301 transitions, 4661 flow [2023-11-06 22:40:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 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) [2023-11-06 22:40:38,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:38,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:38,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-06 22:40:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:40:38,521 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:38,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1134235030, now seen corresponding path program 32 times [2023-11-06 22:40:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:38,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054244559] [2023-11-06 22:40:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054244559] [2023-11-06 22:40:38,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054244559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508417840] [2023-11-06 22:40:38,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:38,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:38,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:38,757 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:38,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:40:38,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:38,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:38,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:39,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508417840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:39,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:39,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 22:40:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801272696] [2023-11-06 22:40:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:39,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:39,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 301 transitions, 4661 flow. Second operand has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:39,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:39,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:39,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:40,819 INFO L124 PetriNetUnfolderBase]: 609/1257 cut-off events. [2023-11-06 22:40:40,819 INFO L125 PetriNetUnfolderBase]: For 12248/12248 co-relation queries the response was YES. [2023-11-06 22:40:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9004 conditions, 1257 events. 609/1257 cut-off events. For 12248/12248 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7528 event pairs, 38 based on Foata normal form. 9/1266 useless extension candidates. Maximal degree in co-relation 8921. Up to 418 conditions per place. [2023-11-06 22:40:40,831 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 209 selfloop transitions, 144 changer transitions 20/373 dead transitions. [2023-11-06 22:40:40,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 373 transitions, 5781 flow [2023-11-06 22:40:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:40:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:40:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2344 transitions. [2023-11-06 22:40:40,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472045293701343 [2023-11-06 22:40:40,834 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2344 transitions. [2023-11-06 22:40:40,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2344 transitions. [2023-11-06 22:40:40,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:40,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2344 transitions. [2023-11-06 22:40:40,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.11111111111111) internal successors, (2344), 36 states have internal predecessors, (2344), 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) [2023-11-06 22:40:40,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 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) [2023-11-06 22:40:40,841 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 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) [2023-11-06 22:40:40,841 INFO L175 Difference]: Start difference. First operand has 286 places, 301 transitions, 4661 flow. Second operand 36 states and 2344 transitions. [2023-11-06 22:40:40,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 373 transitions, 5781 flow [2023-11-06 22:40:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 373 transitions, 5442 flow, removed 25 selfloop flow, removed 25 redundant places. [2023-11-06 22:40:40,937 INFO L231 Difference]: Finished difference. Result has 290 places, 290 transitions, 4472 flow [2023-11-06 22:40:40,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4472, PETRI_PLACES=290, PETRI_TRANSITIONS=290} [2023-11-06 22:40:40,938 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 270 predicate places. [2023-11-06 22:40:40,938 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 290 transitions, 4472 flow [2023-11-06 22:40:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:40,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:40,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:40,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:41,144 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:41,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1445394234, now seen corresponding path program 33 times [2023-11-06 22:40:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:41,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701364659] [2023-11-06 22:40:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:41,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:41,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701364659] [2023-11-06 22:40:41,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701364659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766175944] [2023-11-06 22:40:41,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:41,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:41,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:41,372 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:40:41,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:40:41,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:41,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:40:41,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:41,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:42,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766175944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:42,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:42,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:40:42,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744114898] [2023-11-06 22:40:42,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:42,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:42,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:42,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 290 transitions, 4472 flow. Second operand has 25 states, 25 states have (on average 62.64) internal successors, (1566), 25 states have internal predecessors, (1566), 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) [2023-11-06 22:40:42,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:42,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:42,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:44,275 INFO L124 PetriNetUnfolderBase]: 675/1348 cut-off events. [2023-11-06 22:40:44,275 INFO L125 PetriNetUnfolderBase]: For 17397/17397 co-relation queries the response was YES. [2023-11-06 22:40:44,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10384 conditions, 1348 events. 675/1348 cut-off events. For 17397/17397 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7879 event pairs, 8 based on Foata normal form. 6/1354 useless extension candidates. Maximal degree in co-relation 10304. Up to 668 conditions per place. [2023-11-06 22:40:44,289 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 284 selfloop transitions, 125 changer transitions 23/432 dead transitions. [2023-11-06 22:40:44,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 432 transitions, 7139 flow [2023-11-06 22:40:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:40:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:40:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2619 transitions. [2023-11-06 22:40:44,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41703821656050954 [2023-11-06 22:40:44,294 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2619 transitions. [2023-11-06 22:40:44,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2619 transitions. [2023-11-06 22:40:44,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:44,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2619 transitions. [2023-11-06 22:40:44,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.475) internal successors, (2619), 40 states have internal predecessors, (2619), 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) [2023-11-06 22:40:44,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:40:44,305 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 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) [2023-11-06 22:40:44,305 INFO L175 Difference]: Start difference. First operand has 290 places, 290 transitions, 4472 flow. Second operand 40 states and 2619 transitions. [2023-11-06 22:40:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 432 transitions, 7139 flow [2023-11-06 22:40:44,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 432 transitions, 6774 flow, removed 23 selfloop flow, removed 34 redundant places. [2023-11-06 22:40:44,452 INFO L231 Difference]: Finished difference. Result has 298 places, 334 transitions, 5591 flow [2023-11-06 22:40:44,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5591, PETRI_PLACES=298, PETRI_TRANSITIONS=334} [2023-11-06 22:40:44,453 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 278 predicate places. [2023-11-06 22:40:44,453 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 334 transitions, 5591 flow [2023-11-06 22:40:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.64) internal successors, (1566), 25 states have internal predecessors, (1566), 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) [2023-11-06 22:40:44,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:44,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:44,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:40:44,654 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:44,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1518680094, now seen corresponding path program 34 times [2023-11-06 22:40:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:44,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883285043] [2023-11-06 22:40:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:44,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:44,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883285043] [2023-11-06 22:40:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883285043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:44,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739763878] [2023-11-06 22:40:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:40:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:44,876 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:44,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:40:44,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:40:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:44,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:44,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:45,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:45,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739763878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:45,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:45,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 22:40:45,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223403695] [2023-11-06 22:40:45,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:45,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:40:45,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:45,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:40:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:40:45,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:45,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 334 transitions, 5591 flow. Second operand has 24 states, 24 states have (on average 62.666666666666664) internal successors, (1504), 24 states have internal predecessors, (1504), 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) [2023-11-06 22:40:45,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:45,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:45,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:46,559 INFO L124 PetriNetUnfolderBase]: 650/1276 cut-off events. [2023-11-06 22:40:46,559 INFO L125 PetriNetUnfolderBase]: For 19015/19015 co-relation queries the response was YES. [2023-11-06 22:40:46,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10117 conditions, 1276 events. 650/1276 cut-off events. For 19015/19015 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7252 event pairs, 10 based on Foata normal form. 5/1281 useless extension candidates. Maximal degree in co-relation 10030. Up to 668 conditions per place. [2023-11-06 22:40:46,571 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 254 selfloop transitions, 113 changer transitions 15/382 dead transitions. [2023-11-06 22:40:46,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 382 transitions, 6589 flow [2023-11-06 22:40:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:40:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:40:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1504 transitions. [2023-11-06 22:40:46,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41650512323456107 [2023-11-06 22:40:46,575 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1504 transitions. [2023-11-06 22:40:46,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1504 transitions. [2023-11-06 22:40:46,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:46,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1504 transitions. [2023-11-06 22:40:46,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.3913043478261) internal successors, (1504), 23 states have internal predecessors, (1504), 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) [2023-11-06 22:40:46,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:46,579 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 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) [2023-11-06 22:40:46,579 INFO L175 Difference]: Start difference. First operand has 298 places, 334 transitions, 5591 flow. Second operand 23 states and 1504 transitions. [2023-11-06 22:40:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 382 transitions, 6589 flow [2023-11-06 22:40:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 382 transitions, 5527 flow, removed 436 selfloop flow, removed 28 redundant places. [2023-11-06 22:40:46,700 INFO L231 Difference]: Finished difference. Result has 290 places, 328 transitions, 4783 flow [2023-11-06 22:40:46,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4783, PETRI_PLACES=290, PETRI_TRANSITIONS=328} [2023-11-06 22:40:46,701 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 270 predicate places. [2023-11-06 22:40:46,701 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 328 transitions, 4783 flow [2023-11-06 22:40:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.666666666666664) internal successors, (1504), 24 states have internal predecessors, (1504), 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) [2023-11-06 22:40:46,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:46,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:46,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:40:46,912 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:46,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1789256036, now seen corresponding path program 35 times [2023-11-06 22:40:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:46,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881519585] [2023-11-06 22:40:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:47,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881519585] [2023-11-06 22:40:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881519585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929919018] [2023-11-06 22:40:47,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:40:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:47,126 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:47,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:40:47,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:47,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:47,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:47,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:47,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:47,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929919018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:47,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:47,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:40:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615450913] [2023-11-06 22:40:47,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:47,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:47,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:47,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 328 transitions, 4783 flow. Second operand has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:47,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:47,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:47,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:49,220 INFO L124 PetriNetUnfolderBase]: 871/1628 cut-off events. [2023-11-06 22:40:49,220 INFO L125 PetriNetUnfolderBase]: For 21394/21394 co-relation queries the response was YES. [2023-11-06 22:40:49,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12517 conditions, 1628 events. 871/1628 cut-off events. For 21394/21394 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9191 event pairs, 16 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 12442. Up to 882 conditions per place. [2023-11-06 22:40:49,235 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 318 selfloop transitions, 159 changer transitions 64/541 dead transitions. [2023-11-06 22:40:49,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 541 transitions, 8474 flow [2023-11-06 22:40:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:40:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:40:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2689 transitions. [2023-11-06 22:40:49,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774118378126457 [2023-11-06 22:40:49,240 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2689 transitions. [2023-11-06 22:40:49,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2689 transitions. [2023-11-06 22:40:49,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:49,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2689 transitions. [2023-11-06 22:40:49,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.58536585365853) internal successors, (2689), 41 states have internal predecessors, (2689), 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) [2023-11-06 22:40:49,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 157.0) internal successors, (6594), 42 states have internal predecessors, (6594), 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) [2023-11-06 22:40:49,249 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 157.0) internal successors, (6594), 42 states have internal predecessors, (6594), 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) [2023-11-06 22:40:49,250 INFO L175 Difference]: Start difference. First operand has 290 places, 328 transitions, 4783 flow. Second operand 41 states and 2689 transitions. [2023-11-06 22:40:49,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 541 transitions, 8474 flow [2023-11-06 22:40:49,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 541 transitions, 7514 flow, removed 344 selfloop flow, removed 22 redundant places. [2023-11-06 22:40:49,457 INFO L231 Difference]: Finished difference. Result has 312 places, 395 transitions, 5746 flow [2023-11-06 22:40:49,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5746, PETRI_PLACES=312, PETRI_TRANSITIONS=395} [2023-11-06 22:40:49,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-11-06 22:40:49,458 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 395 transitions, 5746 flow [2023-11-06 22:40:49,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:49,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:49,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:49,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:49,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:49,663 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:49,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash 152650198, now seen corresponding path program 36 times [2023-11-06 22:40:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528687826] [2023-11-06 22:40:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528687826] [2023-11-06 22:40:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528687826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945827750] [2023-11-06 22:40:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:40:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:49,874 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:49,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:40:49,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:40:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:49,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:40:49,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:50,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:50,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945827750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:50,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:50,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 22:40:50,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411350693] [2023-11-06 22:40:50,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:40:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:40:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:40:50,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:50,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 395 transitions, 5746 flow. Second operand has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:50,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:50,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:50,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:52,157 INFO L124 PetriNetUnfolderBase]: 979/1858 cut-off events. [2023-11-06 22:40:52,157 INFO L125 PetriNetUnfolderBase]: For 17516/17516 co-relation queries the response was YES. [2023-11-06 22:40:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13850 conditions, 1858 events. 979/1858 cut-off events. For 17516/17516 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10836 event pairs, 16 based on Foata normal form. 12/1868 useless extension candidates. Maximal degree in co-relation 13772. Up to 855 conditions per place. [2023-11-06 22:40:52,175 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 349 selfloop transitions, 149 changer transitions 74/572 dead transitions. [2023-11-06 22:40:52,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 572 transitions, 8911 flow [2023-11-06 22:40:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:40:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:40:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2232 transitions. [2023-11-06 22:40:52,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181341326339453 [2023-11-06 22:40:52,179 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2232 transitions. [2023-11-06 22:40:52,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2232 transitions. [2023-11-06 22:40:52,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:52,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2232 transitions. [2023-11-06 22:40:52,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 65.6470588235294) internal successors, (2232), 34 states have internal predecessors, (2232), 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) [2023-11-06 22:40:52,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 157.0) internal successors, (5495), 35 states have internal predecessors, (5495), 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) [2023-11-06 22:40:52,189 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 157.0) internal successors, (5495), 35 states have internal predecessors, (5495), 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) [2023-11-06 22:40:52,189 INFO L175 Difference]: Start difference. First operand has 312 places, 395 transitions, 5746 flow. Second operand 34 states and 2232 transitions. [2023-11-06 22:40:52,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 572 transitions, 8911 flow [2023-11-06 22:40:52,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 572 transitions, 8190 flow, removed 234 selfloop flow, removed 31 redundant places. [2023-11-06 22:40:52,361 INFO L231 Difference]: Finished difference. Result has 314 places, 408 transitions, 6074 flow [2023-11-06 22:40:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6074, PETRI_PLACES=314, PETRI_TRANSITIONS=408} [2023-11-06 22:40:52,362 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2023-11-06 22:40:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 408 transitions, 6074 flow [2023-11-06 22:40:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.68) internal successors, (1567), 25 states have internal predecessors, (1567), 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) [2023-11-06 22:40:52,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:52,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:52,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:52,563 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:52,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1811086053, now seen corresponding path program 37 times [2023-11-06 22:40:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814020290] [2023-11-06 22:40:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:52,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814020290] [2023-11-06 22:40:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814020290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251975762] [2023-11-06 22:40:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:40:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:52,788 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:52,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:40:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:52,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:40:52,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:53,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:53,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251975762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:53,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:53,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-06 22:40:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587309145] [2023-11-06 22:40:53,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:40:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:40:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:40:53,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:53,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 408 transitions, 6074 flow. Second operand has 28 states, 28 states have (on average 62.57142857142857) internal successors, (1752), 28 states have internal predecessors, (1752), 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) [2023-11-06 22:40:53,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:53,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:53,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:54,966 INFO L124 PetriNetUnfolderBase]: 1072/1986 cut-off events. [2023-11-06 22:40:54,966 INFO L125 PetriNetUnfolderBase]: For 15529/15529 co-relation queries the response was YES. [2023-11-06 22:40:54,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15144 conditions, 1986 events. 1072/1986 cut-off events. For 15529/15529 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11325 event pairs, 29 based on Foata normal form. 15/1999 useless extension candidates. Maximal degree in co-relation 15058. Up to 714 conditions per place. [2023-11-06 22:40:54,986 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 202 selfloop transitions, 270 changer transitions 151/623 dead transitions. [2023-11-06 22:40:54,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 623 transitions, 10118 flow [2023-11-06 22:40:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:40:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:40:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2986 transitions. [2023-11-06 22:40:54,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41345887565771255 [2023-11-06 22:40:54,990 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2986 transitions. [2023-11-06 22:40:54,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2986 transitions. [2023-11-06 22:40:54,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:54,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2986 transitions. [2023-11-06 22:40:54,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 64.91304347826087) internal successors, (2986), 46 states have internal predecessors, (2986), 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) [2023-11-06 22:40:54,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 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) [2023-11-06 22:40:55,000 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 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) [2023-11-06 22:40:55,000 INFO L175 Difference]: Start difference. First operand has 314 places, 408 transitions, 6074 flow. Second operand 46 states and 2986 transitions. [2023-11-06 22:40:55,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 623 transitions, 10118 flow [2023-11-06 22:40:55,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 623 transitions, 9859 flow, removed 94 selfloop flow, removed 22 redundant places. [2023-11-06 22:40:55,186 INFO L231 Difference]: Finished difference. Result has 347 places, 408 transitions, 7163 flow [2023-11-06 22:40:55,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7163, PETRI_PLACES=347, PETRI_TRANSITIONS=408} [2023-11-06 22:40:55,187 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 327 predicate places. [2023-11-06 22:40:55,187 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 408 transitions, 7163 flow [2023-11-06 22:40:55,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.57142857142857) internal successors, (1752), 28 states have internal predecessors, (1752), 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) [2023-11-06 22:40:55,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:55,188 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:55,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:40:55,389 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:55,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1232399301, now seen corresponding path program 38 times [2023-11-06 22:40:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107518559] [2023-11-06 22:40:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:55,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107518559] [2023-11-06 22:40:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107518559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509185933] [2023-11-06 22:40:55,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:55,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:55,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:55,625 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:55,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:40:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:55,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:40:55,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:55,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:56,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509185933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:56,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:56,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-06 22:40:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609162843] [2023-11-06 22:40:56,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:56,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:40:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:40:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:40:56,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:56,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 408 transitions, 7163 flow. Second operand has 29 states, 29 states have (on average 62.51724137931034) internal successors, (1813), 29 states have internal predecessors, (1813), 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) [2023-11-06 22:40:56,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:56,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:58,100 INFO L124 PetriNetUnfolderBase]: 857/1557 cut-off events. [2023-11-06 22:40:58,100 INFO L125 PetriNetUnfolderBase]: For 15210/15210 co-relation queries the response was YES. [2023-11-06 22:40:58,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 1557 events. 857/1557 cut-off events. For 15210/15210 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8132 event pairs, 23 based on Foata normal form. 3/1558 useless extension candidates. Maximal degree in co-relation 13185. Up to 624 conditions per place. [2023-11-06 22:40:58,119 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 215 selfloop transitions, 284 changer transitions 18/517 dead transitions. [2023-11-06 22:40:58,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 517 transitions, 9107 flow [2023-11-06 22:40:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:40:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 22:40:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2989 transitions. [2023-11-06 22:40:58,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41387427305455554 [2023-11-06 22:40:58,124 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2989 transitions. [2023-11-06 22:40:58,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2989 transitions. [2023-11-06 22:40:58,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:58,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2989 transitions. [2023-11-06 22:40:58,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 64.97826086956522) internal successors, (2989), 46 states have internal predecessors, (2989), 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) [2023-11-06 22:40:58,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 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) [2023-11-06 22:40:58,131 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 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) [2023-11-06 22:40:58,131 INFO L175 Difference]: Start difference. First operand has 347 places, 408 transitions, 7163 flow. Second operand 46 states and 2989 transitions. [2023-11-06 22:40:58,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 517 transitions, 9107 flow [2023-11-06 22:40:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 517 transitions, 8030 flow, removed 372 selfloop flow, removed 46 redundant places. [2023-11-06 22:40:58,318 INFO L231 Difference]: Finished difference. Result has 315 places, 410 transitions, 6817 flow [2023-11-06 22:40:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6817, PETRI_PLACES=315, PETRI_TRANSITIONS=410} [2023-11-06 22:40:58,319 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-11-06 22:40:58,320 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 410 transitions, 6817 flow [2023-11-06 22:40:58,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 62.51724137931034) internal successors, (1813), 29 states have internal predecessors, (1813), 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) [2023-11-06 22:40:58,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:58,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:58,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:58,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:40:58,527 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:40:58,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1306550061, now seen corresponding path program 39 times [2023-11-06 22:40:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368624453] [2023-11-06 22:40:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:58,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368624453] [2023-11-06 22:40:58,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368624453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925512514] [2023-11-06 22:40:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:58,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:58,756 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:58,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:40:58,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:40:58,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:58,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:40:58,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:59,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925512514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:59,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-06 22:40:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538340742] [2023-11-06 22:40:59,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:40:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:40:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:40:59,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:40:59,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 410 transitions, 6817 flow. Second operand has 29 states, 29 states have (on average 62.58620689655172) internal successors, (1815), 29 states have internal predecessors, (1815), 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) [2023-11-06 22:40:59,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:59,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:40:59,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:01,086 INFO L124 PetriNetUnfolderBase]: 870/1556 cut-off events. [2023-11-06 22:41:01,086 INFO L125 PetriNetUnfolderBase]: For 13653/13653 co-relation queries the response was YES. [2023-11-06 22:41:01,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 1556 events. 870/1556 cut-off events. For 13653/13653 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7943 event pairs, 23 based on Foata normal form. 3/1557 useless extension candidates. Maximal degree in co-relation 12551. Up to 626 conditions per place. [2023-11-06 22:41:01,145 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 207 selfloop transitions, 289 changer transitions 22/518 dead transitions. [2023-11-06 22:41:01,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 518 transitions, 8773 flow [2023-11-06 22:41:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:41:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 22:41:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3114 transitions. [2023-11-06 22:41:01,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321656050955413 [2023-11-06 22:41:01,149 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3114 transitions. [2023-11-06 22:41:01,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3114 transitions. [2023-11-06 22:41:01,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:01,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3114 transitions. [2023-11-06 22:41:01,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 64.875) internal successors, (3114), 48 states have internal predecessors, (3114), 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) [2023-11-06 22:41:01,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 157.0) internal successors, (7693), 49 states have internal predecessors, (7693), 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) [2023-11-06 22:41:01,158 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 157.0) internal successors, (7693), 49 states have internal predecessors, (7693), 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) [2023-11-06 22:41:01,158 INFO L175 Difference]: Start difference. First operand has 315 places, 410 transitions, 6817 flow. Second operand 48 states and 3114 transitions. [2023-11-06 22:41:01,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 518 transitions, 8773 flow [2023-11-06 22:41:01,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 518 transitions, 7851 flow, removed 145 selfloop flow, removed 37 redundant places. [2023-11-06 22:41:01,288 INFO L231 Difference]: Finished difference. Result has 319 places, 414 transitions, 6665 flow [2023-11-06 22:41:01,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6665, PETRI_PLACES=319, PETRI_TRANSITIONS=414} [2023-11-06 22:41:01,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 299 predicate places. [2023-11-06 22:41:01,289 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 414 transitions, 6665 flow [2023-11-06 22:41:01,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 62.58620689655172) internal successors, (1815), 29 states have internal predecessors, (1815), 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) [2023-11-06 22:41:01,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:01,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:01,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-06 22:41:01,490 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:01,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1095665639, now seen corresponding path program 40 times [2023-11-06 22:41:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458664491] [2023-11-06 22:41:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:01,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458664491] [2023-11-06 22:41:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458664491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800537744] [2023-11-06 22:41:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:41:01,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:01,707 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:41:01,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:41:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:01,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:41:01,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:01,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:02,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800537744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:02,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-06 22:41:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538012671] [2023-11-06 22:41:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:02,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:41:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:41:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:41:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:41:02,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 414 transitions, 6665 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:41:02,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:02,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:41:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:03,853 INFO L124 PetriNetUnfolderBase]: 1112/1941 cut-off events. [2023-11-06 22:41:03,853 INFO L125 PetriNetUnfolderBase]: For 15420/15420 co-relation queries the response was YES. [2023-11-06 22:41:03,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15464 conditions, 1941 events. 1112/1941 cut-off events. For 15420/15420 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10297 event pairs, 21 based on Foata normal form. 2/1941 useless extension candidates. Maximal degree in co-relation 15387. Up to 1136 conditions per place. [2023-11-06 22:41:03,883 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 347 selfloop transitions, 212 changer transitions 75/634 dead transitions. [2023-11-06 22:41:03,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 634 transitions, 10852 flow [2023-11-06 22:41:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:41:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:41:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3041 transitions. [2023-11-06 22:41:03,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41211546279983735 [2023-11-06 22:41:03,889 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3041 transitions. [2023-11-06 22:41:03,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3041 transitions. [2023-11-06 22:41:03,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:03,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3041 transitions. [2023-11-06 22:41:03,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 64.70212765957447) internal successors, (3041), 47 states have internal predecessors, (3041), 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) [2023-11-06 22:41:03,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 157.0) internal successors, (7536), 48 states have internal predecessors, (7536), 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) [2023-11-06 22:41:03,902 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 157.0) internal successors, (7536), 48 states have internal predecessors, (7536), 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) [2023-11-06 22:41:03,902 INFO L175 Difference]: Start difference. First operand has 319 places, 414 transitions, 6665 flow. Second operand 47 states and 3041 transitions. [2023-11-06 22:41:03,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 634 transitions, 10852 flow [2023-11-06 22:41:04,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 634 transitions, 10030 flow, removed 32 selfloop flow, removed 41 redundant places. [2023-11-06 22:41:04,108 INFO L231 Difference]: Finished difference. Result has 340 places, 494 transitions, 8179 flow [2023-11-06 22:41:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=6008, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=8179, PETRI_PLACES=340, PETRI_TRANSITIONS=494} [2023-11-06 22:41:04,109 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-11-06 22:41:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 494 transitions, 8179 flow [2023-11-06 22:41:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:41:04,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:04,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:04,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:04,325 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:04,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash 743289949, now seen corresponding path program 41 times [2023-11-06 22:41:04,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248864941] [2023-11-06 22:41:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:04,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248864941] [2023-11-06 22:41:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248864941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431317212] [2023-11-06 22:41:04,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:41:04,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:04,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:04,565 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:04,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 22:41:04,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:41:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:04,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:41:04,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431317212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:05,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:05,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-06 22:41:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344210273] [2023-11-06 22:41:05,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:05,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:41:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:41:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:41:05,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:41:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 494 transitions, 8179 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:41:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:41:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:06,777 INFO L124 PetriNetUnfolderBase]: 1150/2001 cut-off events. [2023-11-06 22:41:06,777 INFO L125 PetriNetUnfolderBase]: For 19100/19100 co-relation queries the response was YES. [2023-11-06 22:41:06,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16535 conditions, 2001 events. 1150/2001 cut-off events. For 19100/19100 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10583 event pairs, 22 based on Foata normal form. 8/2009 useless extension candidates. Maximal degree in co-relation 16436. Up to 1063 conditions per place. [2023-11-06 22:41:06,799 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 348 selfloop transitions, 210 changer transitions 105/663 dead transitions. [2023-11-06 22:41:06,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 663 transitions, 11664 flow [2023-11-06 22:41:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:41:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:41:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2657 transitions. [2023-11-06 22:41:06,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127699238775827 [2023-11-06 22:41:06,803 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2657 transitions. [2023-11-06 22:41:06,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2657 transitions. [2023-11-06 22:41:06,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:06,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2657 transitions. [2023-11-06 22:41:06,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 64.8048780487805) internal successors, (2657), 41 states have internal predecessors, (2657), 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) [2023-11-06 22:41:06,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 157.0) internal successors, (6594), 42 states have internal predecessors, (6594), 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) [2023-11-06 22:41:06,811 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 157.0) internal successors, (6594), 42 states have internal predecessors, (6594), 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) [2023-11-06 22:41:06,811 INFO L175 Difference]: Start difference. First operand has 340 places, 494 transitions, 8179 flow. Second operand 41 states and 2657 transitions. [2023-11-06 22:41:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 663 transitions, 11664 flow [2023-11-06 22:41:07,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 663 transitions, 11159 flow, removed 174 selfloop flow, removed 37 redundant places. [2023-11-06 22:41:07,072 INFO L231 Difference]: Finished difference. Result has 349 places, 504 transitions, 8900 flow [2023-11-06 22:41:07,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8900, PETRI_PLACES=349, PETRI_TRANSITIONS=504} [2023-11-06 22:41:07,073 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-11-06 22:41:07,073 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 504 transitions, 8900 flow [2023-11-06 22:41:07,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 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) [2023-11-06 22:41:07,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:07,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:07,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:07,280 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:07,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -745438686, now seen corresponding path program 42 times [2023-11-06 22:41:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:07,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539883110] [2023-11-06 22:41:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:07,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539883110] [2023-11-06 22:41:07,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539883110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014354621] [2023-11-06 22:41:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:41:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:07,551 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:07,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 22:41:07,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:41:07,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:07,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:41:07,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:07,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014354621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:08,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-06 22:41:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546278268] [2023-11-06 22:41:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:41:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:41:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:41:08,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:41:08,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 504 transitions, 8900 flow. Second operand has 30 states, 30 states have (on average 62.56666666666667) internal successors, (1877), 30 states have internal predecessors, (1877), 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) [2023-11-06 22:41:08,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:08,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:41:08,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:10,014 INFO L124 PetriNetUnfolderBase]: 1123/1906 cut-off events. [2023-11-06 22:41:10,014 INFO L125 PetriNetUnfolderBase]: For 21641/21641 co-relation queries the response was YES. [2023-11-06 22:41:10,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16957 conditions, 1906 events. 1123/1906 cut-off events. For 21641/21641 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9629 event pairs, 22 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 16851. Up to 783 conditions per place. [2023-11-06 22:41:10,039 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 199 selfloop transitions, 29 changer transitions 401/629 dead transitions. [2023-11-06 22:41:10,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 629 transitions, 11705 flow [2023-11-06 22:41:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:41:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:41:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2265 transitions. [2023-11-06 22:41:10,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121929026387625 [2023-11-06 22:41:10,043 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2265 transitions. [2023-11-06 22:41:10,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2265 transitions. [2023-11-06 22:41:10,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:10,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2265 transitions. [2023-11-06 22:41:10,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 64.71428571428571) internal successors, (2265), 35 states have internal predecessors, (2265), 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) [2023-11-06 22:41:10,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 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) [2023-11-06 22:41:10,048 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 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) [2023-11-06 22:41:10,048 INFO L175 Difference]: Start difference. First operand has 349 places, 504 transitions, 8900 flow. Second operand 35 states and 2265 transitions. [2023-11-06 22:41:10,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 629 transitions, 11705 flow [2023-11-06 22:41:10,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 629 transitions, 10989 flow, removed 256 selfloop flow, removed 31 redundant places. [2023-11-06 22:41:10,293 INFO L231 Difference]: Finished difference. Result has 336 places, 214 transitions, 3591 flow [2023-11-06 22:41:10,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3591, PETRI_PLACES=336, PETRI_TRANSITIONS=214} [2023-11-06 22:41:10,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-11-06 22:41:10,294 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 214 transitions, 3591 flow [2023-11-06 22:41:10,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.56666666666667) internal successors, (1877), 30 states have internal predecessors, (1877), 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) [2023-11-06 22:41:10,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:10,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:10,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:10,495 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:10,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1817870880, now seen corresponding path program 43 times [2023-11-06 22:41:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:10,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83873352] [2023-11-06 22:41:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:10,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:41:10,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:10,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83873352] [2023-11-06 22:41:10,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83873352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:10,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108781740] [2023-11-06 22:41:10,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:41:10,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:10,764 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:10,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 22:41:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:10,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:41:10,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:11,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108781740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:11,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-11-06 22:41:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558636723] [2023-11-06 22:41:11,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:11,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:41:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:41:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:41:11,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:41:11,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 214 transitions, 3591 flow. Second operand has 30 states, 30 states have (on average 62.63333333333333) internal successors, (1879), 30 states have internal predecessors, (1879), 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) [2023-11-06 22:41:11,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:11,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:41:11,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:12,872 INFO L124 PetriNetUnfolderBase]: 578/999 cut-off events. [2023-11-06 22:41:12,872 INFO L125 PetriNetUnfolderBase]: For 7341/7341 co-relation queries the response was YES. [2023-11-06 22:41:12,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7936 conditions, 999 events. 578/999 cut-off events. For 7341/7341 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4462 event pairs, 0 based on Foata normal form. 6/1005 useless extension candidates. Maximal degree in co-relation 7841. Up to 359 conditions per place. [2023-11-06 22:41:12,882 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 85 selfloop transitions, 169 changer transitions 79/333 dead transitions. [2023-11-06 22:41:12,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 333 transitions, 5314 flow [2023-11-06 22:41:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:41:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 22:41:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2457 transitions. [2023-11-06 22:41:12,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41183372443848476 [2023-11-06 22:41:12,886 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2457 transitions. [2023-11-06 22:41:12,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2457 transitions. [2023-11-06 22:41:12,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:12,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2457 transitions. [2023-11-06 22:41:12,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 64.65789473684211) internal successors, (2457), 38 states have internal predecessors, (2457), 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) [2023-11-06 22:41:12,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 157.0) internal successors, (6123), 39 states have internal predecessors, (6123), 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) [2023-11-06 22:41:12,893 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 157.0) internal successors, (6123), 39 states have internal predecessors, (6123), 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) [2023-11-06 22:41:12,893 INFO L175 Difference]: Start difference. First operand has 336 places, 214 transitions, 3591 flow. Second operand 38 states and 2457 transitions. [2023-11-06 22:41:12,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 333 transitions, 5314 flow [2023-11-06 22:41:12,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 333 transitions, 4454 flow, removed 155 selfloop flow, removed 67 redundant places. [2023-11-06 22:41:12,976 INFO L231 Difference]: Finished difference. Result has 202 places, 213 transitions, 3422 flow [2023-11-06 22:41:12,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3422, PETRI_PLACES=202, PETRI_TRANSITIONS=213} [2023-11-06 22:41:12,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-11-06 22:41:12,977 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 213 transitions, 3422 flow [2023-11-06 22:41:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.63333333333333) internal successors, (1879), 30 states have internal predecessors, (1879), 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) [2023-11-06 22:41:12,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:12,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:12,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-06 22:41:13,187 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:41:13,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1234562675, now seen corresponding path program 44 times [2023-11-06 22:41:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608983170] [2023-11-06 22:41:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:41:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608983170] [2023-11-06 22:41:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608983170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532825566] [2023-11-06 22:41:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:41:13,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:13,472 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:13,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 22:41:13,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:41:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:13,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:41:13,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:13,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532825566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:14,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:14,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 30 [2023-11-06 22:41:14,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718317422] [2023-11-06 22:41:14,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:14,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:41:14,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:14,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:41:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:41:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 157 [2023-11-06 22:41:14,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 213 transitions, 3422 flow. Second operand has 32 states, 32 states have (on average 62.59375) internal successors, (2003), 32 states have internal predecessors, (2003), 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) [2023-11-06 22:41:14,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:14,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 157 [2023-11-06 22:41:14,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:15,301 INFO L124 PetriNetUnfolderBase]: 423/729 cut-off events. [2023-11-06 22:41:15,301 INFO L125 PetriNetUnfolderBase]: For 5208/5208 co-relation queries the response was YES. [2023-11-06 22:41:15,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 729 events. 423/729 cut-off events. For 5208/5208 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2914 event pairs, 0 based on Foata normal form. 3/726 useless extension candidates. Maximal degree in co-relation 5957. Up to 281 conditions per place. [2023-11-06 22:41:15,306 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 0 selfloop transitions, 0 changer transitions 261/261 dead transitions. [2023-11-06 22:41:15,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 261 transitions, 4250 flow [2023-11-06 22:41:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:41:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:41:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1925 transitions. [2023-11-06 22:41:15,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40870488322717624 [2023-11-06 22:41:15,309 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1925 transitions. [2023-11-06 22:41:15,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1925 transitions. [2023-11-06 22:41:15,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:15,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1925 transitions. [2023-11-06 22:41:15,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.16666666666667) internal successors, (1925), 30 states have internal predecessors, (1925), 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) [2023-11-06 22:41:15,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 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) [2023-11-06 22:41:15,313 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 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) [2023-11-06 22:41:15,313 INFO L175 Difference]: Start difference. First operand has 202 places, 213 transitions, 3422 flow. Second operand 30 states and 1925 transitions. [2023-11-06 22:41:15,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 261 transitions, 4250 flow [2023-11-06 22:41:15,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 3904 flow, removed 100 selfloop flow, removed 21 redundant places. [2023-11-06 22:41:15,357 INFO L231 Difference]: Finished difference. Result has 196 places, 0 transitions, 0 flow [2023-11-06 22:41:15,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=0, PETRI_PLACES=196, PETRI_TRANSITIONS=0} [2023-11-06 22:41:15,357 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-11-06 22:41:15,357 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 0 transitions, 0 flow [2023-11-06 22:41:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 62.59375) internal successors, (2003), 32 states have internal predecessors, (2003), 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) [2023-11-06 22:41:15,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-06 22:41:15,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-06 22:41:15,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-06 22:41:15,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 22:41:15,561 INFO L445 BasicCegarLoop]: Path program histogram: [44, 1, 1] [2023-11-06 22:41:15,563 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 22:41:15,564 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:41:15,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:41:15 BasicIcfg [2023-11-06 22:41:15,567 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:41:15,567 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:41:15,567 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:41:15,568 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:41:15,568 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:09" (3/4) ... [2023-11-06 22:41:15,570 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:41:15,573 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-06 22:41:15,573 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-06 22:41:15,577 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-06 22:41:15,577 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 22:41:15,578 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:41:15,578 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:41:15,633 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:41:15,633 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:41:15,634 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:41:15,634 INFO L158 Benchmark]: Toolchain (without parser) took 126525.76ms. Allocated memory was 144.7MB in the beginning and 755.0MB in the end (delta: 610.3MB). Free memory was 100.4MB in the beginning and 638.4MB in the end (delta: -537.9MB). Peak memory consumption was 74.3MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,635 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 111.1MB. Free memory is still 63.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:41:15,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.06ms. Allocated memory is still 144.7MB. Free memory was 99.9MB in the beginning and 89.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.14ms. Allocated memory is still 144.7MB. Free memory was 89.0MB in the beginning and 87.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,636 INFO L158 Benchmark]: Boogie Preprocessor took 26.76ms. Allocated memory is still 144.7MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 877.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:41:15,636 INFO L158 Benchmark]: RCFGBuilder took 434.02ms. Allocated memory is still 144.7MB. Free memory was 86.0MB in the beginning and 71.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,636 INFO L158 Benchmark]: TraceAbstraction took 125673.26ms. Allocated memory was 144.7MB in the beginning and 755.0MB in the end (delta: 610.3MB). Free memory was 71.0MB in the beginning and 641.0MB in the end (delta: -570.0MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,637 INFO L158 Benchmark]: Witness Printer took 66.22ms. Allocated memory is still 755.0MB. Free memory was 641.0MB in the beginning and 638.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:41:15,639 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 111.1MB. Free memory is still 63.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.06ms. Allocated memory is still 144.7MB. Free memory was 99.9MB in the beginning and 89.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.14ms. Allocated memory is still 144.7MB. Free memory was 89.0MB in the beginning and 87.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.76ms. Allocated memory is still 144.7MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 877.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 434.02ms. Allocated memory is still 144.7MB. Free memory was 86.0MB in the beginning and 71.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 125673.26ms. Allocated memory was 144.7MB in the beginning and 755.0MB in the end (delta: 610.3MB). Free memory was 71.0MB in the beginning and 641.0MB in the end (delta: -570.0MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. * Witness Printer took 66.22ms. Allocated memory is still 755.0MB. Free memory was 641.0MB in the beginning and 638.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 72 TotalNumberOfCompositions, 498 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 484, independent: 482, independent conditional: 0, independent unconditional: 482, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 228, independent: 226, independent conditional: 0, independent unconditional: 226, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 484, independent: 256, independent conditional: 0, independent unconditional: 256, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 228, unknown conditional: 0, unknown unconditional: 228] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 125.5s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 44, EmptinessCheckTime: 0.0s, AutomataDifference: 71.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8610 SdHoareTripleChecker+Valid, 32.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8196 mSDsluCounter, 3523 SdHoareTripleChecker+Invalid, 27.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3263 mSDsCounter, 2027 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49929 IncrementalHoareTripleChecker+Invalid, 51956 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2027 mSolverCounterUnsat, 260 mSDtfsCounter, 49929 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2585 GetRequests, 735 SyntacticMatches, 9 SemanticMatches, 1841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24429 ImplicationChecksByTransitivity, 32.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8900occurred in iteration=43, InterpolantAutomatonStates: 1305, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 36.2s InterpolantComputationTime, 1493 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 140 NumberOfCheckSat, 2092 ConstructedInterpolants, 0 QuantifiedInterpolants, 23235 SizeOfPredicates, 181 NumberOfNonLiveVariables, 4869 ConjunctsInSsa, 839 ConjunctsInUnsatCore, 134 InterpolantComputations, 2 PerfectInterpolantSequences, 27/763 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:41:15,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a58c37d3-81f9-4246-9100-6edfdeb1e79b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE