./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:18:30,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:18:30,768 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:18:30,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:18:30,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:18:30,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:18:30,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:18:30,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:18:30,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:18:30,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:18:30,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:18:30,829 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:18:30,829 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:18:30,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:18:30,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:18:30,833 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:18:30,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:18:30,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:18:30,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:18:30,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:18:30,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:18:30,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:18:30,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:18:30,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:18:30,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:18:30,840 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:18:30,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:18:30,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:18:30,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:30,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:18:30,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:18:30,844 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:18:30,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:18:30,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:18:30,845 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:18:30,845 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:18:30,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:18:30,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:18:30,846 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:18:30,846 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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2023-11-06 22:18:31,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:18:31,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:18:31,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:18:31,287 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:18:31,288 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:18:31,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-06 22:18:34,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:34,743 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:34,743 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-06 22:18:34,759 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/data/6c6a0944a/81050d9ede7c4f4c86499f09c3f9889d/FLAG30390aee1 [2023-11-06 22:18:34,778 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/data/6c6a0944a/81050d9ede7c4f4c86499f09c3f9889d [2023-11-06 22:18:34,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:34,786 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:34,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:34,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:34,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:34,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:34" (1/1) ... [2023-11-06 22:18:34,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1d139b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:34, skipping insertion in model container [2023-11-06 22:18:34,800 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:34" (1/1) ... [2023-11-06 22:18:34,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:35,078 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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2023-11-06 22:18:35,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:35,103 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:35,131 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_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2023-11-06 22:18:35,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:35,157 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:35,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35 WrapperNode [2023-11-06 22:18:35,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:35,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:35,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:35,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:35,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,230 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 170 [2023-11-06 22:18:35,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:35,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:35,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:35,232 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:35,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,257 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:35,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:35,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:35,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:35,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (1/1) ... [2023-11-06 22:18:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:35,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:35,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:35,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:18:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:18:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:18:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:18:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:18:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:18:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:18:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:18:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:18:35,381 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 22:18:35,518 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:35,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:36,051 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:36,065 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:36,066 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:18:36,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:36 BoogieIcfgContainer [2023-11-06 22:18:36,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:36,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:36,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:36,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:36,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:34" (1/3) ... [2023-11-06 22:18:36,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4375e135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:36, skipping insertion in model container [2023-11-06 22:18:36,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:35" (2/3) ... [2023-11-06 22:18:36,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4375e135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:36, skipping insertion in model container [2023-11-06 22:18:36,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:36" (3/3) ... [2023-11-06 22:18:36,082 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-11-06 22:18:36,093 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:18:36,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:36,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:18:36,109 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:18:36,339 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:18:36,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 225 transitions, 464 flow [2023-11-06 22:18:36,515 INFO L124 PetriNetUnfolderBase]: 14/223 cut-off events. [2023-11-06 22:18:36,516 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:18:36,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 223 events. 14/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-11-06 22:18:36,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 225 transitions, 464 flow [2023-11-06 22:18:36,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 214 transitions, 440 flow [2023-11-06 22:18:36,546 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:18:36,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 214 transitions, 440 flow [2023-11-06 22:18:36,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 214 transitions, 440 flow [2023-11-06 22:18:36,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 214 transitions, 440 flow [2023-11-06 22:18:36,645 INFO L124 PetriNetUnfolderBase]: 14/214 cut-off events. [2023-11-06 22:18:36,645 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:18:36,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 14/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-11-06 22:18:36,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 10988 [2023-11-06 22:18:44,282 INFO L134 LiptonReduction]: Checked pairs total: 9162 [2023-11-06 22:18:44,282 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-11-06 22:18:44,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:44,306 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;@1e415db7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:44,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:18:44,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:18:44,313 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:18:44,313 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:18:44,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:44,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:44,315 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 22:18:44,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1844635802, now seen corresponding path program 1 times [2023-11-06 22:18:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671816591] [2023-11-06 22:18:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:45,121 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 22:18:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671816591] [2023-11-06 22:18:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671816591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:45,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506810439] [2023-11-06 22:18:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:45,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:45,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:45,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 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 22:18:45,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:45,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:45,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:45,437 INFO L124 PetriNetUnfolderBase]: 64/119 cut-off events. [2023-11-06 22:18:45,438 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-06 22:18:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-11-06 22:18:45,442 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-11-06 22:18:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-11-06 22:18:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1014 transitions. [2023-11-06 22:18:45,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305732484076433 [2023-11-06 22:18:45,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1014 transitions. [2023-11-06 22:18:45,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1014 transitions. [2023-11-06 22:18:45,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:45,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1014 transitions. [2023-11-06 22:18:45,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 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 22:18:45,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:45,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:45,503 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 1014 transitions. [2023-11-06 22:18:45,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-11-06 22:18:45,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:45,510 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-11-06 22:18:45,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, 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=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-06 22:18:45,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-11-06 22:18:45,518 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-11-06 22:18:45,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 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 22:18:45,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:45,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:45,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:18:45,520 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 22:18:45,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash -68926060, now seen corresponding path program 2 times [2023-11-06 22:18:45,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:45,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482300083] [2023-11-06 22:18:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:45,874 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 22:18:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482300083] [2023-11-06 22:18:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482300083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:45,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:45,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681827804] [2023-11-06 22:18:45,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:45,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:45,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:45,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 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 22:18:45,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:45,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:45,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:46,099 INFO L124 PetriNetUnfolderBase]: 63/111 cut-off events. [2023-11-06 22:18:46,099 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-06 22:18:46,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 282 event pairs, 5 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-11-06 22:18:46,101 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-11-06 22:18:46,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-11-06 22:18:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1012 transitions. [2023-11-06 22:18:46,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429723991507431 [2023-11-06 22:18:46,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1012 transitions. [2023-11-06 22:18:46,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1012 transitions. [2023-11-06 22:18:46,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:46,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1012 transitions. [2023-11-06 22:18:46,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 0 states have call successors, (0), 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 22:18:46,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:46,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:46,121 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 1012 transitions. [2023-11-06 22:18:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-11-06 22:18:46,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:46,124 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-11-06 22:18:46,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-06 22:18:46,125 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-11-06 22:18:46,125 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-11-06 22:18:46,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 0 states have call successors, (0), 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 22:18:46,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:46,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:46,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:18:46,127 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 22:18:46,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -592412559, now seen corresponding path program 1 times [2023-11-06 22:18:46,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:46,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968155478] [2023-11-06 22:18:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968155478] [2023-11-06 22:18:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968155478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268287805] [2023-11-06 22:18:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:46,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:46,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:46,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:46,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:18:46,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268287805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:18:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978229320] [2023-11-06 22:18:46,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:46,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:46,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 198.4) internal successors, (1984), 10 states have internal predecessors, (1984), 0 states have call successors, (0), 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 22:18:46,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:46,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:46,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:46,726 INFO L124 PetriNetUnfolderBase]: 98/167 cut-off events. [2023-11-06 22:18:46,726 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-06 22:18:46,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 167 events. 98/167 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 470 event pairs, 30 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 532. Up to 122 conditions per place. [2023-11-06 22:18:46,732 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 30 selfloop transitions, 14 changer transitions 0/44 dead transitions. [2023-11-06 22:18:46,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 292 flow [2023-11-06 22:18:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:18:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-11-06 22:18:46,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295824486907289 [2023-11-06 22:18:46,739 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-11-06 22:18:46,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-11-06 22:18:46,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:46,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-11-06 22:18:46,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 0 states have call successors, (0), 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 22:18:46,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 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 22:18:46,756 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 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 22:18:46,756 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 6 states and 1214 transitions. [2023-11-06 22:18:46,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 292 flow [2023-11-06 22:18:46,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:46,762 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 205 flow [2023-11-06 22:18:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 22:18:46,765 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-06 22:18:46,765 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 205 flow [2023-11-06 22:18:46,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.4) internal successors, (1984), 10 states have internal predecessors, (1984), 0 states have call successors, (0), 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 22:18:46,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:46,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:46,983 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 22:18:46,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash 638505903, now seen corresponding path program 2 times [2023-11-06 22:18:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122391143] [2023-11-06 22:18:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:46,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:47,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122391143] [2023-11-06 22:18:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122391143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:47,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:47,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668121265] [2023-11-06 22:18:47,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:47,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:47,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 471 [2023-11-06 22:18:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:47,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:47,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 471 [2023-11-06 22:18:47,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:47,238 INFO L124 PetriNetUnfolderBase]: 122/211 cut-off events. [2023-11-06 22:18:47,239 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-11-06 22:18:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 211 events. 122/211 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 638 event pairs, 24 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 670. Up to 100 conditions per place. [2023-11-06 22:18:47,242 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 46 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2023-11-06 22:18:47,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 440 flow [2023-11-06 22:18:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1030 transitions. [2023-11-06 22:18:47,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43736730360934184 [2023-11-06 22:18:47,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1030 transitions. [2023-11-06 22:18:47,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1030 transitions. [2023-11-06 22:18:47,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:47,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1030 transitions. [2023-11-06 22:18:47,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 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 22:18:47,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:47,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:47,261 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 205 flow. Second operand 5 states and 1030 transitions. [2023-11-06 22:18:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 440 flow [2023-11-06 22:18:47,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 412 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-11-06 22:18:47,269 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 250 flow [2023-11-06 22:18:47,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-06 22:18:47,270 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-06 22:18:47,270 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 250 flow [2023-11-06 22:18:47,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:47,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:47,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:18:47,272 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 22:18:47,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1244963120, now seen corresponding path program 1 times [2023-11-06 22:18:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:47,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196622551] [2023-11-06 22:18:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:47,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196622551] [2023-11-06 22:18:47,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196622551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:47,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:47,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752226889] [2023-11-06 22:18:47,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:47,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:47,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 471 [2023-11-06 22:18:47,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:47,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:47,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 471 [2023-11-06 22:18:47,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:47,540 INFO L124 PetriNetUnfolderBase]: 121/214 cut-off events. [2023-11-06 22:18:47,541 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2023-11-06 22:18:47,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 214 events. 121/214 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 678 event pairs, 36 based on Foata normal form. 4/218 useless extension candidates. Maximal degree in co-relation 768. Up to 134 conditions per place. [2023-11-06 22:18:47,544 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 41 selfloop transitions, 9 changer transitions 6/56 dead transitions. [2023-11-06 22:18:47,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 458 flow [2023-11-06 22:18:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-11-06 22:18:47,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609341825902337 [2023-11-06 22:18:47,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-11-06 22:18:47,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-11-06 22:18:47,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:47,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-11-06 22:18:47,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 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 22:18:47,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:47,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:47,589 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 250 flow. Second operand 5 states and 1027 transitions. [2023-11-06 22:18:47,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 458 flow [2023-11-06 22:18:47,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 445 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:47,595 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 262 flow [2023-11-06 22:18:47,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-11-06 22:18:47,596 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-11-06 22:18:47,596 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 262 flow [2023-11-06 22:18:47,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:47,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:47,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:47,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:18:47,598 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 22:18:47,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1578086837, now seen corresponding path program 3 times [2023-11-06 22:18:47,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:47,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879037741] [2023-11-06 22:18:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:47,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:47,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879037741] [2023-11-06 22:18:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879037741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181460301] [2023-11-06 22:18:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:47,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:47,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:47,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:47,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:47,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:18:47,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:47,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:47,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181460301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:47,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:47,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:18:47,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102252594] [2023-11-06 22:18:47,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:47,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:47,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 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 22:18:47,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:47,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:47,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:48,203 INFO L124 PetriNetUnfolderBase]: 120/215 cut-off events. [2023-11-06 22:18:48,204 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2023-11-06 22:18:48,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 215 events. 120/215 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 23 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 908. Up to 119 conditions per place. [2023-11-06 22:18:48,207 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 44 selfloop transitions, 25 changer transitions 1/70 dead transitions. [2023-11-06 22:18:48,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 596 flow [2023-11-06 22:18:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:18:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2016 transitions. [2023-11-06 22:18:48,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280254777070064 [2023-11-06 22:18:48,217 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2016 transitions. [2023-11-06 22:18:48,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2016 transitions. [2023-11-06 22:18:48,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:48,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2016 transitions. [2023-11-06 22:18:48,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.6) internal successors, (2016), 10 states have internal predecessors, (2016), 0 states have call successors, (0), 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 22:18:48,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:18:48,240 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:18:48,240 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 262 flow. Second operand 10 states and 2016 transitions. [2023-11-06 22:18:48,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 596 flow [2023-11-06 22:18:48,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 576 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:48,247 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 434 flow [2023-11-06 22:18:48,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=434, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-06 22:18:48,248 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-11-06 22:18:48,248 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 434 flow [2023-11-06 22:18:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 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 22:18:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:48,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:48,458 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 22:18:48,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash -906531855, now seen corresponding path program 4 times [2023-11-06 22:18:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219596936] [2023-11-06 22:18:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:48,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219596936] [2023-11-06 22:18:48,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219596936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:48,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:48,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:48,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912575267] [2023-11-06 22:18:48,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:48,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:48,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:48,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 471 [2023-11-06 22:18:48,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:48,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:48,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 471 [2023-11-06 22:18:48,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:48,708 INFO L124 PetriNetUnfolderBase]: 118/217 cut-off events. [2023-11-06 22:18:48,708 INFO L125 PetriNetUnfolderBase]: For 789/789 co-relation queries the response was YES. [2023-11-06 22:18:48,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 217 events. 118/217 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 29 based on Foata normal form. 2/219 useless extension candidates. Maximal degree in co-relation 885. Up to 137 conditions per place. [2023-11-06 22:18:48,712 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 39 selfloop transitions, 18 changer transitions 3/60 dead transitions. [2023-11-06 22:18:48,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 611 flow [2023-11-06 22:18:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1023 transitions. [2023-11-06 22:18:48,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43439490445859874 [2023-11-06 22:18:48,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1023 transitions. [2023-11-06 22:18:48,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1023 transitions. [2023-11-06 22:18:48,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:48,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1023 transitions. [2023-11-06 22:18:48,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.6) internal successors, (1023), 5 states have internal predecessors, (1023), 0 states have call successors, (0), 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 22:18:48,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:48,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:48,731 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 434 flow. Second operand 5 states and 1023 transitions. [2023-11-06 22:18:48,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 611 flow [2023-11-06 22:18:48,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 545 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:48,741 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 400 flow [2023-11-06 22:18:48,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=400, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-11-06 22:18:48,744 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-06 22:18:48,744 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 400 flow [2023-11-06 22:18:48,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 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 22:18:48,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:48,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:48,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:18:48,746 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 22:18:48,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1430616942, now seen corresponding path program 2 times [2023-11-06 22:18:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832584427] [2023-11-06 22:18:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:48,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832584427] [2023-11-06 22:18:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832584427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195149350] [2023-11-06 22:18:48,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:48,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:48,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:48,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:18:48,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:49,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:49,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195149350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:49,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:49,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 22:18:49,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128233873] [2023-11-06 22:18:49,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:49,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:18:49,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:18:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:49,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:49,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 22:18:49,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:49,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:49,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:49,271 INFO L124 PetriNetUnfolderBase]: 122/221 cut-off events. [2023-11-06 22:18:49,272 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2023-11-06 22:18:49,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1069 conditions, 221 events. 122/221 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 700 event pairs, 12 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 995. Up to 67 conditions per place. [2023-11-06 22:18:49,275 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 48 selfloop transitions, 24 changer transitions 0/72 dead transitions. [2023-11-06 22:18:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 690 flow [2023-11-06 22:18:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1417 transitions. [2023-11-06 22:18:49,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42978465271458904 [2023-11-06 22:18:49,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1417 transitions. [2023-11-06 22:18:49,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1417 transitions. [2023-11-06 22:18:49,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:49,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1417 transitions. [2023-11-06 22:18:49,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.42857142857142) internal successors, (1417), 7 states have internal predecessors, (1417), 0 states have call successors, (0), 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 22:18:49,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:49,296 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:49,296 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 400 flow. Second operand 7 states and 1417 transitions. [2023-11-06 22:18:49,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 690 flow [2023-11-06 22:18:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 640 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:49,304 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 462 flow [2023-11-06 22:18:49,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-11-06 22:18:49,305 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-06 22:18:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 462 flow [2023-11-06 22:18:49,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 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 22:18:49,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:49,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:49,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:49,512 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 22:18:49,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1027209903, now seen corresponding path program 5 times [2023-11-06 22:18:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:49,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544807647] [2023-11-06 22:18:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544807647] [2023-11-06 22:18:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544807647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:49,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:49,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799622233] [2023-11-06 22:18:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:49,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:49,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2023-11-06 22:18:49,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 462 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:49,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:49,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2023-11-06 22:18:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:49,745 INFO L124 PetriNetUnfolderBase]: 121/222 cut-off events. [2023-11-06 22:18:49,746 INFO L125 PetriNetUnfolderBase]: For 794/794 co-relation queries the response was YES. [2023-11-06 22:18:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 222 events. 121/222 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 713 event pairs, 36 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 971. Up to 184 conditions per place. [2023-11-06 22:18:49,749 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 40 selfloop transitions, 16 changer transitions 2/58 dead transitions. [2023-11-06 22:18:49,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 607 flow [2023-11-06 22:18:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-11-06 22:18:49,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309978768577495 [2023-11-06 22:18:49,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-11-06 22:18:49,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-11-06 22:18:49,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:49,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-11-06 22:18:49,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 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 22:18:49,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:49,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:49,768 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 462 flow. Second operand 5 states and 1015 transitions. [2023-11-06 22:18:49,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 607 flow [2023-11-06 22:18:49,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 547 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:49,784 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 425 flow [2023-11-06 22:18:49,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-06 22:18:49,786 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-06 22:18:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 425 flow [2023-11-06 22:18:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:49,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:18:49,797 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 22:18:49,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 101677910, now seen corresponding path program 3 times [2023-11-06 22:18:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133249532] [2023-11-06 22:18:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:49,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133249532] [2023-11-06 22:18:49,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133249532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:49,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:49,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:49,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418650477] [2023-11-06 22:18:49,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:49,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:49,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:49,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2023-11-06 22:18:49,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:49,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:49,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2023-11-06 22:18:49,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:50,020 INFO L124 PetriNetUnfolderBase]: 119/222 cut-off events. [2023-11-06 22:18:50,021 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2023-11-06 22:18:50,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 222 events. 119/222 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 726 event pairs, 34 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 853. Up to 182 conditions per place. [2023-11-06 22:18:50,024 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 40 selfloop transitions, 15 changer transitions 4/59 dead transitions. [2023-11-06 22:18:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 573 flow [2023-11-06 22:18:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1016 transitions. [2023-11-06 22:18:50,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43142250530785564 [2023-11-06 22:18:50,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:50,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 0 states have call successors, (0), 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 22:18:50,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,056 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,056 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 425 flow. Second operand 5 states and 1016 transitions. [2023-11-06 22:18:50,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 573 flow [2023-11-06 22:18:50,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 59 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:50,063 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 415 flow [2023-11-06 22:18:50,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-11-06 22:18:50,064 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-06 22:18:50,064 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 415 flow [2023-11-06 22:18:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:50,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:50,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:18:50,066 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 22:18:50,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1026571258, now seen corresponding path program 4 times [2023-11-06 22:18:50,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439930671] [2023-11-06 22:18:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:50,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439930671] [2023-11-06 22:18:50,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439930671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:50,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:50,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624892222] [2023-11-06 22:18:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:50,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:50,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2023-11-06 22:18:50,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 415 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:50,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2023-11-06 22:18:50,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:50,283 INFO L124 PetriNetUnfolderBase]: 124/227 cut-off events. [2023-11-06 22:18:50,283 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2023-11-06 22:18:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 227 events. 124/227 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 730 event pairs, 36 based on Foata normal form. 4/231 useless extension candidates. Maximal degree in co-relation 985. Up to 186 conditions per place. [2023-11-06 22:18:50,287 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 43 selfloop transitions, 16 changer transitions 0/59 dead transitions. [2023-11-06 22:18:50,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 587 flow [2023-11-06 22:18:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1016 transitions. [2023-11-06 22:18:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43142250530785564 [2023-11-06 22:18:50,293 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:50,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1016 transitions. [2023-11-06 22:18:50,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 0 states have call successors, (0), 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 22:18:50,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,303 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 415 flow. Second operand 5 states and 1016 transitions. [2023-11-06 22:18:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 587 flow [2023-11-06 22:18:50,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 59 transitions, 553 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:50,309 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 428 flow [2023-11-06 22:18:50,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-06 22:18:50,310 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-06 22:18:50,310 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 428 flow [2023-11-06 22:18:50,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:50,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:18:50,312 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 22:18:50,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 428005861, now seen corresponding path program 6 times [2023-11-06 22:18:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196880288] [2023-11-06 22:18:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196880288] [2023-11-06 22:18:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196880288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:50,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:50,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803125273] [2023-11-06 22:18:50,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:50,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:50,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2023-11-06 22:18:50,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:50,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2023-11-06 22:18:50,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:50,538 INFO L124 PetriNetUnfolderBase]: 120/215 cut-off events. [2023-11-06 22:18:50,538 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2023-11-06 22:18:50,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 215 events. 120/215 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 659 event pairs, 29 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 853. Up to 157 conditions per place. [2023-11-06 22:18:50,541 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 34 selfloop transitions, 19 changer transitions 2/55 dead transitions. [2023-11-06 22:18:50,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 544 flow [2023-11-06 22:18:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1014 transitions. [2023-11-06 22:18:50,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305732484076433 [2023-11-06 22:18:50,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1014 transitions. [2023-11-06 22:18:50,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1014 transitions. [2023-11-06 22:18:50,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:50,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1014 transitions. [2023-11-06 22:18:50,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 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 22:18:50,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,558 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,559 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 428 flow. Second operand 5 states and 1014 transitions. [2023-11-06 22:18:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 544 flow [2023-11-06 22:18:50,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 508 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:50,566 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 407 flow [2023-11-06 22:18:50,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-11-06 22:18:50,567 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-06 22:18:50,567 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 407 flow [2023-11-06 22:18:50,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:50,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:18:50,568 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 22:18:50,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1285956870, now seen corresponding path program 5 times [2023-11-06 22:18:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022335451] [2023-11-06 22:18:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:50,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022335451] [2023-11-06 22:18:50,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022335451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:50,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:50,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594289831] [2023-11-06 22:18:50,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:50,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:50,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:50,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2023-11-06 22:18:50,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:50,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2023-11-06 22:18:50,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:50,797 INFO L124 PetriNetUnfolderBase]: 115/208 cut-off events. [2023-11-06 22:18:50,797 INFO L125 PetriNetUnfolderBase]: For 635/635 co-relation queries the response was YES. [2023-11-06 22:18:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 208 events. 115/208 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 635 event pairs, 31 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 805. Up to 153 conditions per place. [2023-11-06 22:18:50,815 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 34 selfloop transitions, 17 changer transitions 4/55 dead transitions. [2023-11-06 22:18:50,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 532 flow [2023-11-06 22:18:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-11-06 22:18:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309978768577495 [2023-11-06 22:18:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-11-06 22:18:50,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-11-06 22:18:50,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:50,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-11-06 22:18:50,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 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 22:18:50,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 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 22:18:50,833 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 407 flow. Second operand 5 states and 1015 transitions. [2023-11-06 22:18:50,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 532 flow [2023-11-06 22:18:50,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 489 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:50,839 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 376 flow [2023-11-06 22:18:50,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-11-06 22:18:50,841 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-06 22:18:50,841 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 376 flow [2023-11-06 22:18:50,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 22:18:50,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:50,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:18:50,842 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 22:18:50,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1249926196, now seen corresponding path program 6 times [2023-11-06 22:18:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730038960] [2023-11-06 22:18:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730038960] [2023-11-06 22:18:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730038960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843843362] [2023-11-06 22:18:50,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:50,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:50,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:51,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:18:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:51,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:18:51,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:51,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843843362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:51,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:18:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927789586] [2023-11-06 22:18:51,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:51,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:18:51,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 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 22:18:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:18:51,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:51,416 INFO L124 PetriNetUnfolderBase]: 110/193 cut-off events. [2023-11-06 22:18:51,417 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2023-11-06 22:18:51,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 193 events. 110/193 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 563 event pairs, 14 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 800. Up to 68 conditions per place. [2023-11-06 22:18:51,420 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 41 selfloop transitions, 28 changer transitions 0/69 dead transitions. [2023-11-06 22:18:51,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 624 flow [2023-11-06 22:18:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:18:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2009 transitions. [2023-11-06 22:18:51,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653927813163484 [2023-11-06 22:18:51,429 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2009 transitions. [2023-11-06 22:18:51,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2009 transitions. [2023-11-06 22:18:51,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:51,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2009 transitions. [2023-11-06 22:18:51,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.9) internal successors, (2009), 10 states have internal predecessors, (2009), 0 states have call successors, (0), 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 22:18:51,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:18:51,448 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:18:51,448 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 376 flow. Second operand 10 states and 2009 transitions. [2023-11-06 22:18:51,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 624 flow [2023-11-06 22:18:51,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 583 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:51,454 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 441 flow [2023-11-06 22:18:51,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=441, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-11-06 22:18:51,456 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-06 22:18:51,456 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 441 flow [2023-11-06 22:18:51,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 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 22:18:51,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:51,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:51,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:51,664 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 22:18:51,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1703397241, now seen corresponding path program 1 times [2023-11-06 22:18:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966599749] [2023-11-06 22:18:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:51,907 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 22:18:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966599749] [2023-11-06 22:18:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966599749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123612602] [2023-11-06 22:18:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:51,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:51,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:18:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:52,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:52,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:52,174 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 22:18:52,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:52,407 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 22:18:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123612602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:52,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:52,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:18:52,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531236007] [2023-11-06 22:18:52,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:52,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:52,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:52,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:18:52,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 441 flow. Second operand has 12 states, 12 states have (on average 192.33333333333334) internal successors, (2308), 12 states have internal predecessors, (2308), 0 states have call successors, (0), 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 22:18:52,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:52,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:18:52,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:52,880 INFO L124 PetriNetUnfolderBase]: 146/266 cut-off events. [2023-11-06 22:18:52,880 INFO L125 PetriNetUnfolderBase]: For 756/763 co-relation queries the response was YES. [2023-11-06 22:18:52,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 266 events. 146/266 cut-off events. For 756/763 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 948 event pairs, 6 based on Foata normal form. 5/266 useless extension candidates. Maximal degree in co-relation 1196. Up to 170 conditions per place. [2023-11-06 22:18:52,884 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 57 selfloop transitions, 19 changer transitions 5/89 dead transitions. [2023-11-06 22:18:52,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 790 flow [2023-11-06 22:18:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1375 transitions. [2023-11-06 22:18:52,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41704579921140433 [2023-11-06 22:18:52,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1375 transitions. [2023-11-06 22:18:52,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1375 transitions. [2023-11-06 22:18:52,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:52,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1375 transitions. [2023-11-06 22:18:52,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.42857142857142) internal successors, (1375), 7 states have internal predecessors, (1375), 0 states have call successors, (0), 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 22:18:52,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:52,906 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:52,907 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 441 flow. Second operand 7 states and 1375 transitions. [2023-11-06 22:18:52,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 790 flow [2023-11-06 22:18:52,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 696 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-06 22:18:52,914 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 524 flow [2023-11-06 22:18:52,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-11-06 22:18:52,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-11-06 22:18:52,916 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 524 flow [2023-11-06 22:18:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.33333333333334) internal successors, (2308), 12 states have internal predecessors, (2308), 0 states have call successors, (0), 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 22:18:52,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:52,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:52,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:53,123 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 22:18:53,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1636400089, now seen corresponding path program 2 times [2023-11-06 22:18:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:53,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628551686] [2023-11-06 22:18:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:53,447 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 22:18:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628551686] [2023-11-06 22:18:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628551686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133741213] [2023-11-06 22:18:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:53,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:18:53,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:53,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:53,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:53,695 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 22:18:53,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:53,902 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 22:18:53,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133741213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:53,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:53,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 22:18:53,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180758171] [2023-11-06 22:18:53,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:53,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:18:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:18:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:18:54,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:18:54,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 524 flow. Second operand has 11 states, 11 states have (on average 192.27272727272728) internal successors, (2115), 11 states have internal predecessors, (2115), 0 states have call successors, (0), 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 22:18:54,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:54,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:18:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:54,503 INFO L124 PetriNetUnfolderBase]: 151/275 cut-off events. [2023-11-06 22:18:54,503 INFO L125 PetriNetUnfolderBase]: For 928/934 co-relation queries the response was YES. [2023-11-06 22:18:54,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 275 events. 151/275 cut-off events. For 928/934 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 993 event pairs, 8 based on Foata normal form. 5/274 useless extension candidates. Maximal degree in co-relation 1342. Up to 198 conditions per place. [2023-11-06 22:18:54,508 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 54 selfloop transitions, 20 changer transitions 5/87 dead transitions. [2023-11-06 22:18:54,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 778 flow [2023-11-06 22:18:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1370 transitions. [2023-11-06 22:18:54,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41552926903245374 [2023-11-06 22:18:54,514 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1370 transitions. [2023-11-06 22:18:54,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1370 transitions. [2023-11-06 22:18:54,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:54,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1370 transitions. [2023-11-06 22:18:54,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.71428571428572) internal successors, (1370), 7 states have internal predecessors, (1370), 0 states have call successors, (0), 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 22:18:54,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:54,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:54,531 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 524 flow. Second operand 7 states and 1370 transitions. [2023-11-06 22:18:54,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 778 flow [2023-11-06 22:18:54,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 728 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:54,542 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 587 flow [2023-11-06 22:18:54,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-11-06 22:18:54,543 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-11-06 22:18:54,543 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 587 flow [2023-11-06 22:18:54,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.27272727272728) internal successors, (2115), 11 states have internal predecessors, (2115), 0 states have call successors, (0), 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 22:18:54,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:54,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:54,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:54,750 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 22:18:54,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash 222041913, now seen corresponding path program 3 times [2023-11-06 22:18:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227438600] [2023-11-06 22:18:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:55,042 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 22:18:55,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227438600] [2023-11-06 22:18:55,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227438600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:55,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849006799] [2023-11-06 22:18:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:55,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:55,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:18:55,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:55,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:55,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:55,261 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 22:18:55,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:55,487 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 22:18:55,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849006799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:55,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:55,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:18:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565884314] [2023-11-06 22:18:55,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:18:55,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:18:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 587 flow. Second operand has 13 states, 13 states have (on average 192.23076923076923) internal successors, (2499), 13 states have internal predecessors, (2499), 0 states have call successors, (0), 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 22:18:55,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:55,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:18:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:55,991 INFO L124 PetriNetUnfolderBase]: 148/266 cut-off events. [2023-11-06 22:18:55,991 INFO L125 PetriNetUnfolderBase]: For 985/991 co-relation queries the response was YES. [2023-11-06 22:18:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 266 events. 148/266 cut-off events. For 985/991 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 6 based on Foata normal form. 5/265 useless extension candidates. Maximal degree in co-relation 1328. Up to 174 conditions per place. [2023-11-06 22:18:55,996 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 55 selfloop transitions, 21 changer transitions 5/89 dead transitions. [2023-11-06 22:18:55,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 822 flow [2023-11-06 22:18:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1373 transitions. [2023-11-06 22:18:56,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164391871398241 [2023-11-06 22:18:56,004 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1373 transitions. [2023-11-06 22:18:56,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1373 transitions. [2023-11-06 22:18:56,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:56,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1373 transitions. [2023-11-06 22:18:56,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 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 22:18:56,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:56,020 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:56,020 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 587 flow. Second operand 7 states and 1373 transitions. [2023-11-06 22:18:56,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 822 flow [2023-11-06 22:18:56,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 782 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:56,032 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 626 flow [2023-11-06 22:18:56,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2023-11-06 22:18:56,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-11-06 22:18:56,033 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 626 flow [2023-11-06 22:18:56,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 192.23076923076923) internal successors, (2499), 13 states have internal predecessors, (2499), 0 states have call successors, (0), 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 22:18:56,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:56,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:56,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:18:56,249 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 22:18:56,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1729059071, now seen corresponding path program 4 times [2023-11-06 22:18:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328362662] [2023-11-06 22:18:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:56,513 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 22:18:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:56,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328362662] [2023-11-06 22:18:56,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328362662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:56,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261498329] [2023-11-06 22:18:56,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:56,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:56,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:56,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:56,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:56,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:56,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:56,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:56,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:56,780 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 22:18:56,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:56,965 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 22:18:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261498329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:56,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:56,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 22:18:56,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110190567] [2023-11-06 22:18:56,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:56,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:18:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:18:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:18:57,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:18:57,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 626 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 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 22:18:57,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:57,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:18:57,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:57,461 INFO L124 PetriNetUnfolderBase]: 170/306 cut-off events. [2023-11-06 22:18:57,461 INFO L125 PetriNetUnfolderBase]: For 1245/1251 co-relation queries the response was YES. [2023-11-06 22:18:57,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563 conditions, 306 events. 170/306 cut-off events. For 1245/1251 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1148 event pairs, 6 based on Foata normal form. 5/305 useless extension candidates. Maximal degree in co-relation 1534. Up to 248 conditions per place. [2023-11-06 22:18:57,466 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 61 selfloop transitions, 19 changer transitions 5/93 dead transitions. [2023-11-06 22:18:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 929 flow [2023-11-06 22:18:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1362 transitions. [2023-11-06 22:18:57,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41310282074613286 [2023-11-06 22:18:57,476 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1362 transitions. [2023-11-06 22:18:57,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1362 transitions. [2023-11-06 22:18:57,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:57,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1362 transitions. [2023-11-06 22:18:57,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.57142857142858) internal successors, (1362), 7 states have internal predecessors, (1362), 0 states have call successors, (0), 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 22:18:57,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:57,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:57,491 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 626 flow. Second operand 7 states and 1362 transitions. [2023-11-06 22:18:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 929 flow [2023-11-06 22:18:57,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 884 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:57,506 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 763 flow [2023-11-06 22:18:57,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2023-11-06 22:18:57,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-11-06 22:18:57,507 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 763 flow [2023-11-06 22:18:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 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 22:18:57,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:57,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:57,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:18:57,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:18:57,732 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 22:18:57,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash -828778579, now seen corresponding path program 5 times [2023-11-06 22:18:57,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:57,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535207888] [2023-11-06 22:18:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:57,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:58,000 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 22:18:58,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:58,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535207888] [2023-11-06 22:18:58,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535207888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:58,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985230887] [2023-11-06 22:18:58,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:18:58,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:58,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:58,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:58,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:18:58,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:58,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:58,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:58,217 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 22:18:58,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:58,419 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 22:18:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985230887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:58,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:58,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:18:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335606598] [2023-11-06 22:18:58,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:58,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:18:58,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 763 flow. Second operand has 12 states, 12 states have (on average 192.33333333333334) internal successors, (2308), 12 states have internal predecessors, (2308), 0 states have call successors, (0), 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 22:18:58,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:58,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:18:58,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:58,907 INFO L124 PetriNetUnfolderBase]: 183/333 cut-off events. [2023-11-06 22:18:58,908 INFO L125 PetriNetUnfolderBase]: For 1576/1582 co-relation queries the response was YES. [2023-11-06 22:18:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 333 events. 183/333 cut-off events. For 1576/1582 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1289 event pairs, 6 based on Foata normal form. 5/332 useless extension candidates. Maximal degree in co-relation 1756. Up to 252 conditions per place. [2023-11-06 22:18:58,913 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 69 selfloop transitions, 20 changer transitions 5/102 dead transitions. [2023-11-06 22:18:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 1059 flow [2023-11-06 22:18:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1369 transitions. [2023-11-06 22:18:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41522596299666364 [2023-11-06 22:18:58,918 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1369 transitions. [2023-11-06 22:18:58,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1369 transitions. [2023-11-06 22:18:58,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:58,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1369 transitions. [2023-11-06 22:18:58,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.57142857142858) internal successors, (1369), 7 states have internal predecessors, (1369), 0 states have call successors, (0), 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 22:18:58,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:58,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:18:58,929 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 763 flow. Second operand 7 states and 1369 transitions. [2023-11-06 22:18:58,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 1059 flow [2023-11-06 22:18:58,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 102 transitions, 1022 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:58,946 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 839 flow [2023-11-06 22:18:58,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=839, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-11-06 22:18:58,948 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-11-06 22:18:58,948 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 839 flow [2023-11-06 22:18:58,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.33333333333334) internal successors, (2308), 12 states have internal predecessors, (2308), 0 states have call successors, (0), 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 22:18:58,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:58,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:58,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:59,156 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 22:18:59,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -856484209, now seen corresponding path program 6 times [2023-11-06 22:18:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250527059] [2023-11-06 22:18:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:59,427 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 22:18:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250527059] [2023-11-06 22:18:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250527059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112727361] [2023-11-06 22:18:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:59,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:59,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:59,430 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:59,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:59,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:18:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:59,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:59,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:59,672 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 22:18:59,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:59,866 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 22:18:59,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112727361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:59,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:59,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:18:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766052741] [2023-11-06 22:18:59,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:59,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:18:59,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:18:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:00,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:00,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 839 flow. Second operand has 13 states, 13 states have (on average 192.23076923076923) internal successors, (2499), 13 states have internal predecessors, (2499), 0 states have call successors, (0), 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 22:19:00,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:00,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:00,359 INFO L124 PetriNetUnfolderBase]: 180/324 cut-off events. [2023-11-06 22:19:00,359 INFO L125 PetriNetUnfolderBase]: For 1895/1901 co-relation queries the response was YES. [2023-11-06 22:19:00,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 324 events. 180/324 cut-off events. For 1895/1901 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1243 event pairs, 6 based on Foata normal form. 5/323 useless extension candidates. Maximal degree in co-relation 1786. Up to 252 conditions per place. [2023-11-06 22:19:00,365 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 67 selfloop transitions, 21 changer transitions 5/101 dead transitions. [2023-11-06 22:19:00,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 101 transitions, 1099 flow [2023-11-06 22:19:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1367 transitions. [2023-11-06 22:19:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146193509250834 [2023-11-06 22:19:00,370 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1367 transitions. [2023-11-06 22:19:00,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1367 transitions. [2023-11-06 22:19:00,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:00,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1367 transitions. [2023-11-06 22:19:00,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 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 22:19:00,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:00,380 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:00,380 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 839 flow. Second operand 7 states and 1367 transitions. [2023-11-06 22:19:00,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 101 transitions, 1099 flow [2023-11-06 22:19:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 101 transitions, 1033 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:00,395 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 867 flow [2023-11-06 22:19:00,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=867, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-11-06 22:19:00,396 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-11-06 22:19:00,396 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 867 flow [2023-11-06 22:19:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 192.23076923076923) internal successors, (2499), 13 states have internal predecessors, (2499), 0 states have call successors, (0), 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 22:19:00,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:00,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:00,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:00,604 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 22:19:00,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1480933286, now seen corresponding path program 7 times [2023-11-06 22:19:00,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715388744] [2023-11-06 22:19:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:00,732 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 22:19:00,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715388744] [2023-11-06 22:19:00,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715388744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165734923] [2023-11-06 22:19:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:00,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:00,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:19:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:00,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:00,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:00,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165734923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:00,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:19:00,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663810560] [2023-11-06 22:19:00,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:00,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:19:00,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:19:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:19:01,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:01,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 867 flow. Second operand has 11 states, 11 states have (on average 198.45454545454547) internal successors, (2183), 11 states have internal predecessors, (2183), 0 states have call successors, (0), 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 22:19:01,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:01,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:01,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:01,343 INFO L124 PetriNetUnfolderBase]: 228/403 cut-off events. [2023-11-06 22:19:01,343 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2023-11-06 22:19:01,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 403 events. 228/403 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1573 event pairs, 24 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2185. Up to 108 conditions per place. [2023-11-06 22:19:01,350 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 84 selfloop transitions, 50 changer transitions 0/134 dead transitions. [2023-11-06 22:19:01,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1462 flow [2023-11-06 22:19:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:19:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:19:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2024 transitions. [2023-11-06 22:19:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429723991507431 [2023-11-06 22:19:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2024 transitions. [2023-11-06 22:19:01,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2024 transitions. [2023-11-06 22:19:01,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:01,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2024 transitions. [2023-11-06 22:19:01,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 202.4) internal successors, (2024), 10 states have internal predecessors, (2024), 0 states have call successors, (0), 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 22:19:01,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:01,373 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:01,373 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 867 flow. Second operand 10 states and 2024 transitions. [2023-11-06 22:19:01,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1462 flow [2023-11-06 22:19:01,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1401 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-11-06 22:19:01,392 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 1118 flow [2023-11-06 22:19:01,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1118, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2023-11-06 22:19:01,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-11-06 22:19:01,393 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 1118 flow [2023-11-06 22:19:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 198.45454545454547) internal successors, (2183), 11 states have internal predecessors, (2183), 0 states have call successors, (0), 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 22:19:01,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:01,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:01,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:01,602 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 22:19:01,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1225437669, now seen corresponding path program 8 times [2023-11-06 22:19:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:01,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413270061] [2023-11-06 22:19:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:01,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:01,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413270061] [2023-11-06 22:19:01,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413270061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:01,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977492756] [2023-11-06 22:19:01,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:01,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:01,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:19:01,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:01,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:01,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:01,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:01,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977492756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:01,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:01,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:19:01,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006500210] [2023-11-06 22:19:01,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:19:01,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:19:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:19:01,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:01,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 1118 flow. Second operand has 11 states, 11 states have (on average 198.36363636363637) internal successors, (2182), 11 states have internal predecessors, (2182), 0 states have call successors, (0), 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 22:19:01,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:01,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:02,188 INFO L124 PetriNetUnfolderBase]: 230/413 cut-off events. [2023-11-06 22:19:02,189 INFO L125 PetriNetUnfolderBase]: For 3381/3381 co-relation queries the response was YES. [2023-11-06 22:19:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 413 events. 230/413 cut-off events. For 3381/3381 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1669 event pairs, 37 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2446. Up to 183 conditions per place. [2023-11-06 22:19:02,196 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 81 selfloop transitions, 34 changer transitions 11/126 dead transitions. [2023-11-06 22:19:02,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 126 transitions, 1553 flow [2023-11-06 22:19:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1420 transitions. [2023-11-06 22:19:02,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43069457082195933 [2023-11-06 22:19:02,201 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1420 transitions. [2023-11-06 22:19:02,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1420 transitions. [2023-11-06 22:19:02,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:02,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1420 transitions. [2023-11-06 22:19:02,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.85714285714286) internal successors, (1420), 7 states have internal predecessors, (1420), 0 states have call successors, (0), 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 22:19:02,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:02,212 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:02,212 INFO L175 Difference]: Start difference. First operand has 101 places, 98 transitions, 1118 flow. Second operand 7 states and 1420 transitions. [2023-11-06 22:19:02,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 126 transitions, 1553 flow [2023-11-06 22:19:02,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 1466 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-06 22:19:02,237 INFO L231 Difference]: Finished difference. Result has 107 places, 96 transitions, 1079 flow [2023-11-06 22:19:02,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2023-11-06 22:19:02,285 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-06 22:19:02,285 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 1079 flow [2023-11-06 22:19:02,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 198.36363636363637) internal successors, (2182), 11 states have internal predecessors, (2182), 0 states have call successors, (0), 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 22:19:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:02,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:02,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:02,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:19:02,487 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 22:19:02,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1326544912, now seen corresponding path program 9 times [2023-11-06 22:19:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803123707] [2023-11-06 22:19:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:02,588 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 22:19:02,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803123707] [2023-11-06 22:19:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803123707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067447877] [2023-11-06 22:19:02,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:02,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:02,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:02,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:19:02,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:19:02,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:02,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:02,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:02,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:02,804 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 22:19:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067447877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:02,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233949963] [2023-11-06 22:19:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:02,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:02,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 1079 flow. Second operand has 12 states, 12 states have (on average 198.16666666666666) internal successors, (2378), 12 states have internal predecessors, (2378), 0 states have call successors, (0), 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 22:19:02,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:02,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:02,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:03,265 INFO L124 PetriNetUnfolderBase]: 269/464 cut-off events. [2023-11-06 22:19:03,266 INFO L125 PetriNetUnfolderBase]: For 4083/4083 co-relation queries the response was YES. [2023-11-06 22:19:03,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2872 conditions, 464 events. 269/464 cut-off events. For 4083/4083 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1826 event pairs, 30 based on Foata normal form. 14/478 useless extension candidates. Maximal degree in co-relation 2805. Up to 178 conditions per place. [2023-11-06 22:19:03,275 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 78 selfloop transitions, 74 changer transitions 0/152 dead transitions. [2023-11-06 22:19:03,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1886 flow [2023-11-06 22:19:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:19:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:19:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3218 transitions. [2023-11-06 22:19:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42701698513800423 [2023-11-06 22:19:03,283 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3218 transitions. [2023-11-06 22:19:03,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3218 transitions. [2023-11-06 22:19:03,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:03,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3218 transitions. [2023-11-06 22:19:03,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 201.125) internal successors, (3218), 16 states have internal predecessors, (3218), 0 states have call successors, (0), 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 22:19:03,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:03,305 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:03,305 INFO L175 Difference]: Start difference. First operand has 107 places, 96 transitions, 1079 flow. Second operand 16 states and 3218 transitions. [2023-11-06 22:19:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1886 flow [2023-11-06 22:19:03,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 1767 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:03,329 INFO L231 Difference]: Finished difference. Result has 121 places, 122 transitions, 1554 flow [2023-11-06 22:19:03,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1554, PETRI_PLACES=121, PETRI_TRANSITIONS=122} [2023-11-06 22:19:03,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2023-11-06 22:19:03,330 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 122 transitions, 1554 flow [2023-11-06 22:19:03,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.16666666666666) internal successors, (2378), 12 states have internal predecessors, (2378), 0 states have call successors, (0), 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 22:19:03,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:03,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:03,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:19:03,538 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 22:19:03,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1209484832, now seen corresponding path program 10 times [2023-11-06 22:19:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947839416] [2023-11-06 22:19:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:03,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947839416] [2023-11-06 22:19:03,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947839416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440521764] [2023-11-06 22:19:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:03,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:19:03,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:03,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:03,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:03,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:03,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:03,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440521764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:03,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:03,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318263320] [2023-11-06 22:19:03,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:03,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:03,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 122 transitions, 1554 flow. Second operand has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:03,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:03,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:03,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:04,306 INFO L124 PetriNetUnfolderBase]: 269/468 cut-off events. [2023-11-06 22:19:04,306 INFO L125 PetriNetUnfolderBase]: For 4985/4985 co-relation queries the response was YES. [2023-11-06 22:19:04,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 468 events. 269/468 cut-off events. For 4985/4985 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1886 event pairs, 41 based on Foata normal form. 4/472 useless extension candidates. Maximal degree in co-relation 3133. Up to 219 conditions per place. [2023-11-06 22:19:04,315 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 80 selfloop transitions, 64 changer transitions 2/146 dead transitions. [2023-11-06 22:19:04,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 146 transitions, 2039 flow [2023-11-06 22:19:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:19:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:19:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2610 transitions. [2023-11-06 22:19:04,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42626163645271925 [2023-11-06 22:19:04,325 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2610 transitions. [2023-11-06 22:19:04,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2610 transitions. [2023-11-06 22:19:04,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:04,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2610 transitions. [2023-11-06 22:19:04,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 200.76923076923077) internal successors, (2610), 13 states have internal predecessors, (2610), 0 states have call successors, (0), 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 22:19:04,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:19:04,343 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:19:04,343 INFO L175 Difference]: Start difference. First operand has 121 places, 122 transitions, 1554 flow. Second operand 13 states and 2610 transitions. [2023-11-06 22:19:04,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 146 transitions, 2039 flow [2023-11-06 22:19:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 146 transitions, 1791 flow, removed 94 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:04,379 INFO L231 Difference]: Finished difference. Result has 130 places, 122 transitions, 1444 flow [2023-11-06 22:19:04,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1444, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2023-11-06 22:19:04,381 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-11-06 22:19:04,381 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 1444 flow [2023-11-06 22:19:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:04,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:04,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:19:04,588 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 22:19:04,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1468082847, now seen corresponding path program 11 times [2023-11-06 22:19:04,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:04,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733286919] [2023-11-06 22:19:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:04,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733286919] [2023-11-06 22:19:04,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733286919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:04,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570087106] [2023-11-06 22:19:04,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:04,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:04,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:04,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:19:04,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:04,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:04,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570087106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:04,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:04,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198498775] [2023-11-06 22:19:04,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:04,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:04,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:05,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:05,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 1444 flow. Second operand has 12 states, 12 states have (on average 198.16666666666666) internal successors, (2378), 12 states have internal predecessors, (2378), 0 states have call successors, (0), 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 22:19:05,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:05,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:05,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:05,325 INFO L124 PetriNetUnfolderBase]: 317/544 cut-off events. [2023-11-06 22:19:05,325 INFO L125 PetriNetUnfolderBase]: For 6792/6792 co-relation queries the response was YES. [2023-11-06 22:19:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3747 conditions, 544 events. 317/544 cut-off events. For 6792/6792 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2228 event pairs, 59 based on Foata normal form. 16/560 useless extension candidates. Maximal degree in co-relation 3683. Up to 349 conditions per place. [2023-11-06 22:19:05,336 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 107 selfloop transitions, 65 changer transitions 2/174 dead transitions. [2023-11-06 22:19:05,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 174 transitions, 2395 flow [2023-11-06 22:19:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:19:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:19:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2418 transitions. [2023-11-06 22:19:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278131634819533 [2023-11-06 22:19:05,342 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2418 transitions. [2023-11-06 22:19:05,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2418 transitions. [2023-11-06 22:19:05,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:05,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2418 transitions. [2023-11-06 22:19:05,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.5) internal successors, (2418), 12 states have internal predecessors, (2418), 0 states have call successors, (0), 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 22:19:05,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:05,357 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:05,357 INFO L175 Difference]: Start difference. First operand has 130 places, 122 transitions, 1444 flow. Second operand 12 states and 2418 transitions. [2023-11-06 22:19:05,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 174 transitions, 2395 flow [2023-11-06 22:19:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 174 transitions, 2270 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-06 22:19:05,394 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1961 flow [2023-11-06 22:19:05,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1961, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2023-11-06 22:19:05,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-06 22:19:05,396 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1961 flow [2023-11-06 22:19:05,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.16666666666666) internal successors, (2378), 12 states have internal predecessors, (2378), 0 states have call successors, (0), 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 22:19:05,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:05,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:05,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:05,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:19:05,603 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 22:19:05,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2084068687, now seen corresponding path program 12 times [2023-11-06 22:19:05,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:05,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201817404] [2023-11-06 22:19:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:05,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201817404] [2023-11-06 22:19:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201817404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932721016] [2023-11-06 22:19:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:05,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:05,717 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:05,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:19:05,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:19:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:05,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:05,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:05,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:05,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932721016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:05,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:05,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:19:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188808718] [2023-11-06 22:19:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:05,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:06,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:06,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1961 flow. Second operand has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 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 22:19:06,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:06,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:06,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:06,347 INFO L124 PetriNetUnfolderBase]: 314/537 cut-off events. [2023-11-06 22:19:06,347 INFO L125 PetriNetUnfolderBase]: For 7198/7198 co-relation queries the response was YES. [2023-11-06 22:19:06,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3888 conditions, 537 events. 314/537 cut-off events. For 7198/7198 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2160 event pairs, 59 based on Foata normal form. 4/541 useless extension candidates. Maximal degree in co-relation 3779. Up to 363 conditions per place. [2023-11-06 22:19:06,364 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 113 selfloop transitions, 48 changer transitions 10/171 dead transitions. [2023-11-06 22:19:06,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 171 transitions, 2425 flow [2023-11-06 22:19:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:19:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:19:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2214 transitions. [2023-11-06 22:19:06,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273306311522872 [2023-11-06 22:19:06,370 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2214 transitions. [2023-11-06 22:19:06,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2214 transitions. [2023-11-06 22:19:06,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:06,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2214 transitions. [2023-11-06 22:19:06,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 201.27272727272728) internal successors, (2214), 11 states have internal predecessors, (2214), 0 states have call successors, (0), 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 22:19:06,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:06,384 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:06,384 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1961 flow. Second operand 11 states and 2214 transitions. [2023-11-06 22:19:06,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 171 transitions, 2425 flow [2023-11-06 22:19:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 171 transitions, 2122 flow, removed 115 selfloop flow, removed 4 redundant places. [2023-11-06 22:19:06,441 INFO L231 Difference]: Finished difference. Result has 143 places, 142 transitions, 1698 flow [2023-11-06 22:19:06,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1698, PETRI_PLACES=143, PETRI_TRANSITIONS=142} [2023-11-06 22:19:06,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2023-11-06 22:19:06,443 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 142 transitions, 1698 flow [2023-11-06 22:19:06,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 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 22:19:06,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:06,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:06,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:06,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:19:06,651 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 22:19:06,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -640883693, now seen corresponding path program 13 times [2023-11-06 22:19:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262704543] [2023-11-06 22:19:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:06,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:06,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262704543] [2023-11-06 22:19:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262704543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:06,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721647243] [2023-11-06 22:19:06,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:06,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:06,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:06,735 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:19:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:06,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:06,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:06,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721647243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:06,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019027710] [2023-11-06 22:19:06,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:06,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:06,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:06,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:07,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:07,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 142 transitions, 1698 flow. Second operand has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:07,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:07,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:07,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:07,402 INFO L124 PetriNetUnfolderBase]: 307/520 cut-off events. [2023-11-06 22:19:07,402 INFO L125 PetriNetUnfolderBase]: For 5654/5654 co-relation queries the response was YES. [2023-11-06 22:19:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 520 events. 307/520 cut-off events. For 5654/5654 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2056 event pairs, 56 based on Foata normal form. 8/528 useless extension candidates. Maximal degree in co-relation 3423. Up to 338 conditions per place. [2023-11-06 22:19:07,415 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 103 selfloop transitions, 69 changer transitions 0/172 dead transitions. [2023-11-06 22:19:07,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 172 transitions, 2235 flow [2023-11-06 22:19:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3410 transitions. [2023-11-06 22:19:07,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258773573123517 [2023-11-06 22:19:07,425 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3410 transitions. [2023-11-06 22:19:07,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3410 transitions. [2023-11-06 22:19:07,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:07,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3410 transitions. [2023-11-06 22:19:07,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.58823529411765) internal successors, (3410), 17 states have internal predecessors, (3410), 0 states have call successors, (0), 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 22:19:07,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:07,452 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:07,452 INFO L175 Difference]: Start difference. First operand has 143 places, 142 transitions, 1698 flow. Second operand 17 states and 3410 transitions. [2023-11-06 22:19:07,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 172 transitions, 2235 flow [2023-11-06 22:19:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 172 transitions, 2125 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-06 22:19:07,502 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1830 flow [2023-11-06 22:19:07,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1830, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2023-11-06 22:19:07,503 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-11-06 22:19:07,504 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1830 flow [2023-11-06 22:19:07,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:07,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:07,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:07,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:19:07,711 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 22:19:07,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 608105168, now seen corresponding path program 14 times [2023-11-06 22:19:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341822668] [2023-11-06 22:19:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:07,828 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 22:19:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341822668] [2023-11-06 22:19:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341822668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624416731] [2023-11-06 22:19:07,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:07,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:07,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:19:07,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:07,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:07,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:07,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:08,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:08,085 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 22:19:08,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624416731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:08,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:08,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:19:08,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242899891] [2023-11-06 22:19:08,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:08,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:08,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1830 flow. Second operand has 13 states, 13 states have (on average 198.3846153846154) internal successors, (2579), 13 states have internal predecessors, (2579), 0 states have call successors, (0), 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 22:19:08,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:08,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:08,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:08,549 INFO L124 PetriNetUnfolderBase]: 366/625 cut-off events. [2023-11-06 22:19:08,550 INFO L125 PetriNetUnfolderBase]: For 7232/7232 co-relation queries the response was YES. [2023-11-06 22:19:08,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 625 events. 366/625 cut-off events. For 7232/7232 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2559 event pairs, 32 based on Foata normal form. 10/635 useless extension candidates. Maximal degree in co-relation 4079. Up to 225 conditions per place. [2023-11-06 22:19:08,564 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 123 selfloop transitions, 79 changer transitions 0/202 dead transitions. [2023-11-06 22:19:08,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 202 transitions, 2654 flow [2023-11-06 22:19:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2815 transitions. [2023-11-06 22:19:08,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42690324537458296 [2023-11-06 22:19:08,572 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2815 transitions. [2023-11-06 22:19:08,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2815 transitions. [2023-11-06 22:19:08,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:08,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2815 transitions. [2023-11-06 22:19:08,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 201.07142857142858) internal successors, (2815), 14 states have internal predecessors, (2815), 0 states have call successors, (0), 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 22:19:08,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:08,589 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:08,589 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1830 flow. Second operand 14 states and 2815 transitions. [2023-11-06 22:19:08,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 202 transitions, 2654 flow [2023-11-06 22:19:08,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 202 transitions, 2451 flow, removed 36 selfloop flow, removed 11 redundant places. [2023-11-06 22:19:08,644 INFO L231 Difference]: Finished difference. Result has 156 places, 172 transitions, 2099 flow [2023-11-06 22:19:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2099, PETRI_PLACES=156, PETRI_TRANSITIONS=172} [2023-11-06 22:19:08,649 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 136 predicate places. [2023-11-06 22:19:08,650 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 172 transitions, 2099 flow [2023-11-06 22:19:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.3846153846154) internal successors, (2579), 13 states have internal predecessors, (2579), 0 states have call successors, (0), 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 22:19:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:08,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:08,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:08,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:19:08,858 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 22:19:08,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1528665846, now seen corresponding path program 15 times [2023-11-06 22:19:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422643024] [2023-11-06 22:19:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:08,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422643024] [2023-11-06 22:19:08,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422643024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362002578] [2023-11-06 22:19:08,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:08,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:08,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:08,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:19:09,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:19:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:09,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:09,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:09,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:09,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362002578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:09,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:09,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:09,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638512070] [2023-11-06 22:19:09,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:09,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:09,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:09,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 172 transitions, 2099 flow. Second operand has 15 states, 15 states have (on average 197.73333333333332) internal successors, (2966), 15 states have internal predecessors, (2966), 0 states have call successors, (0), 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 22:19:09,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:09,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:09,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:09,671 INFO L124 PetriNetUnfolderBase]: 417/702 cut-off events. [2023-11-06 22:19:09,672 INFO L125 PetriNetUnfolderBase]: For 9516/9516 co-relation queries the response was YES. [2023-11-06 22:19:09,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 702 events. 417/702 cut-off events. For 9516/9516 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2954 event pairs, 50 based on Foata normal form. 8/710 useless extension candidates. Maximal degree in co-relation 4843. Up to 304 conditions per place. [2023-11-06 22:19:09,687 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 104 selfloop transitions, 115 changer transitions 5/224 dead transitions. [2023-11-06 22:19:09,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 224 transitions, 3186 flow [2023-11-06 22:19:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:19:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:19:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3207 transitions. [2023-11-06 22:19:09,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255573248407643 [2023-11-06 22:19:09,694 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3207 transitions. [2023-11-06 22:19:09,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3207 transitions. [2023-11-06 22:19:09,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:09,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3207 transitions. [2023-11-06 22:19:09,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 200.4375) internal successors, (3207), 16 states have internal predecessors, (3207), 0 states have call successors, (0), 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 22:19:09,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:09,711 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:09,712 INFO L175 Difference]: Start difference. First operand has 156 places, 172 transitions, 2099 flow. Second operand 16 states and 3207 transitions. [2023-11-06 22:19:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 224 transitions, 3186 flow [2023-11-06 22:19:09,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 224 transitions, 3060 flow, removed 44 selfloop flow, removed 4 redundant places. [2023-11-06 22:19:09,775 INFO L231 Difference]: Finished difference. Result has 172 places, 197 transitions, 2754 flow [2023-11-06 22:19:09,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2754, PETRI_PLACES=172, PETRI_TRANSITIONS=197} [2023-11-06 22:19:09,776 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2023-11-06 22:19:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 197 transitions, 2754 flow [2023-11-06 22:19:09,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.73333333333332) internal successors, (2966), 15 states have internal predecessors, (2966), 0 states have call successors, (0), 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 22:19:09,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:09,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:09,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:19:09,983 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 22:19:09,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1793725028, now seen corresponding path program 16 times [2023-11-06 22:19:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399935699] [2023-11-06 22:19:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:10,065 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 22:19:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399935699] [2023-11-06 22:19:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399935699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206149281] [2023-11-06 22:19:10,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:10,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:10,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:10,068 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:19:10,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:10,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:10,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:10,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206149281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:10,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416269509] [2023-11-06 22:19:10,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:10,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:10,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 197 transitions, 2754 flow. Second operand has 15 states, 15 states have (on average 198.13333333333333) internal successors, (2972), 15 states have internal predecessors, (2972), 0 states have call successors, (0), 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 22:19:10,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:10,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:10,955 INFO L124 PetriNetUnfolderBase]: 573/968 cut-off events. [2023-11-06 22:19:10,955 INFO L125 PetriNetUnfolderBase]: For 15347/15347 co-relation queries the response was YES. [2023-11-06 22:19:10,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7086 conditions, 968 events. 573/968 cut-off events. For 15347/15347 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4397 event pairs, 37 based on Foata normal form. 10/978 useless extension candidates. Maximal degree in co-relation 7001. Up to 299 conditions per place. [2023-11-06 22:19:10,980 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 148 selfloop transitions, 161 changer transitions 0/309 dead transitions. [2023-11-06 22:19:10,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 309 transitions, 4557 flow [2023-11-06 22:19:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:19:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:19:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4614 transitions. [2023-11-06 22:19:10,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592079756300194 [2023-11-06 22:19:10,998 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4614 transitions. [2023-11-06 22:19:10,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4614 transitions. [2023-11-06 22:19:11,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:11,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4614 transitions. [2023-11-06 22:19:11,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 200.6086956521739) internal successors, (4614), 23 states have internal predecessors, (4614), 0 states have call successors, (0), 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 22:19:11,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 471.0) internal successors, (11304), 24 states have internal predecessors, (11304), 0 states have call successors, (0), 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 22:19:11,027 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 471.0) internal successors, (11304), 24 states have internal predecessors, (11304), 0 states have call successors, (0), 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 22:19:11,027 INFO L175 Difference]: Start difference. First operand has 172 places, 197 transitions, 2754 flow. Second operand 23 states and 4614 transitions. [2023-11-06 22:19:11,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 309 transitions, 4557 flow [2023-11-06 22:19:11,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 309 transitions, 4240 flow, removed 123 selfloop flow, removed 6 redundant places. [2023-11-06 22:19:11,143 INFO L231 Difference]: Finished difference. Result has 192 places, 267 transitions, 3890 flow [2023-11-06 22:19:11,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3890, PETRI_PLACES=192, PETRI_TRANSITIONS=267} [2023-11-06 22:19:11,144 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 172 predicate places. [2023-11-06 22:19:11,144 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 267 transitions, 3890 flow [2023-11-06 22:19:11,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 198.13333333333333) internal successors, (2972), 15 states have internal predecessors, (2972), 0 states have call successors, (0), 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 22:19:11,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:11,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:11,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:11,351 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 22:19:11,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash 986852838, now seen corresponding path program 17 times [2023-11-06 22:19:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:11,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206560946] [2023-11-06 22:19:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:11,432 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 22:19:11,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:11,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206560946] [2023-11-06 22:19:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206560946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059054590] [2023-11-06 22:19:11,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:11,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:11,434 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:11,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:19:11,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:11,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:11,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:11,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:11,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059054590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:11,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:11,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:19:11,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057961993] [2023-11-06 22:19:11,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:11,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:11,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:11,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:11,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 267 transitions, 3890 flow. Second operand has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:11,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:11,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:11,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:12,305 INFO L124 PetriNetUnfolderBase]: 636/1067 cut-off events. [2023-11-06 22:19:12,305 INFO L125 PetriNetUnfolderBase]: For 18448/18448 co-relation queries the response was YES. [2023-11-06 22:19:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8461 conditions, 1067 events. 636/1067 cut-off events. For 18448/18448 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4957 event pairs, 44 based on Foata normal form. 16/1083 useless extension candidates. Maximal degree in co-relation 8321. Up to 394 conditions per place. [2023-11-06 22:19:12,328 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 113 selfloop transitions, 213 changer transitions 0/326 dead transitions. [2023-11-06 22:19:12,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 326 transitions, 5294 flow [2023-11-06 22:19:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3416 transitions. [2023-11-06 22:19:12,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266267016360684 [2023-11-06 22:19:12,336 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3416 transitions. [2023-11-06 22:19:12,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3416 transitions. [2023-11-06 22:19:12,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:12,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3416 transitions. [2023-11-06 22:19:12,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.94117647058823) internal successors, (3416), 17 states have internal predecessors, (3416), 0 states have call successors, (0), 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 22:19:12,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:12,354 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:12,354 INFO L175 Difference]: Start difference. First operand has 192 places, 267 transitions, 3890 flow. Second operand 17 states and 3416 transitions. [2023-11-06 22:19:12,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 326 transitions, 5294 flow [2023-11-06 22:19:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 326 transitions, 4981 flow, removed 104 selfloop flow, removed 10 redundant places. [2023-11-06 22:19:12,484 INFO L231 Difference]: Finished difference. Result has 202 places, 298 transitions, 4818 flow [2023-11-06 22:19:12,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4818, PETRI_PLACES=202, PETRI_TRANSITIONS=298} [2023-11-06 22:19:12,485 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-11-06 22:19:12,485 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 298 transitions, 4818 flow [2023-11-06 22:19:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:12,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:12,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:12,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:12,692 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 22:19:12,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash 600725426, now seen corresponding path program 18 times [2023-11-06 22:19:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:12,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343932719] [2023-11-06 22:19:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:12,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:12,781 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 22:19:12,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:12,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343932719] [2023-11-06 22:19:12,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343932719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890777327] [2023-11-06 22:19:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:12,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:12,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:12,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:19:12,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:19:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:12,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:12,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:12,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:13,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890777327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:13,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276213201] [2023-11-06 22:19:13,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:13,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:13,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:13,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:13,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 298 transitions, 4818 flow. Second operand has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:19:13,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:13,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:13,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:13,983 INFO L124 PetriNetUnfolderBase]: 685/1146 cut-off events. [2023-11-06 22:19:13,983 INFO L125 PetriNetUnfolderBase]: For 25996/25996 co-relation queries the response was YES. [2023-11-06 22:19:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9969 conditions, 1146 events. 685/1146 cut-off events. For 25996/25996 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5350 event pairs, 148 based on Foata normal form. 28/1174 useless extension candidates. Maximal degree in co-relation 9821. Up to 984 conditions per place. [2023-11-06 22:19:14,011 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 299 selfloop transitions, 59 changer transitions 0/358 dead transitions. [2023-11-06 22:19:14,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 358 transitions, 6494 flow [2023-11-06 22:19:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:19:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:19:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3820 transitions. [2023-11-06 22:19:14,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268633366856632 [2023-11-06 22:19:14,020 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3820 transitions. [2023-11-06 22:19:14,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3820 transitions. [2023-11-06 22:19:14,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:14,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3820 transitions. [2023-11-06 22:19:14,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 201.05263157894737) internal successors, (3820), 19 states have internal predecessors, (3820), 0 states have call successors, (0), 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 22:19:14,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:19:14,041 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:19:14,041 INFO L175 Difference]: Start difference. First operand has 202 places, 298 transitions, 4818 flow. Second operand 19 states and 3820 transitions. [2023-11-06 22:19:14,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 358 transitions, 6494 flow [2023-11-06 22:19:14,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 358 transitions, 6173 flow, removed 135 selfloop flow, removed 6 redundant places. [2023-11-06 22:19:14,254 INFO L231 Difference]: Finished difference. Result has 226 places, 323 transitions, 5431 flow [2023-11-06 22:19:14,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5431, PETRI_PLACES=226, PETRI_TRANSITIONS=323} [2023-11-06 22:19:14,255 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-11-06 22:19:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 323 transitions, 5431 flow [2023-11-06 22:19:14,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:19:14,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:14,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:14,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:19:14,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:19:14,457 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 22:19:14,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -873246478, now seen corresponding path program 19 times [2023-11-06 22:19:14,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215172173] [2023-11-06 22:19:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:14,544 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 22:19:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215172173] [2023-11-06 22:19:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215172173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214148500] [2023-11-06 22:19:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:14,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:14,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:14,546 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:14,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:19:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:14,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:14,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:14,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214148500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:14,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:14,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445134021] [2023-11-06 22:19:14,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:14,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:14,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 323 transitions, 5431 flow. Second operand has 12 states, 12 states have (on average 198.08333333333334) internal successors, (2377), 12 states have internal predecessors, (2377), 0 states have call successors, (0), 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 22:19:14,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:14,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:14,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:15,610 INFO L124 PetriNetUnfolderBase]: 738/1229 cut-off events. [2023-11-06 22:19:15,610 INFO L125 PetriNetUnfolderBase]: For 34864/34864 co-relation queries the response was YES. [2023-11-06 22:19:15,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11266 conditions, 1229 events. 738/1229 cut-off events. For 34864/34864 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5841 event pairs, 85 based on Foata normal form. 12/1241 useless extension candidates. Maximal degree in co-relation 11105. Up to 743 conditions per place. [2023-11-06 22:19:15,644 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 234 selfloop transitions, 148 changer transitions 0/382 dead transitions. [2023-11-06 22:19:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 382 transitions, 7304 flow [2023-11-06 22:19:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3420 transitions. [2023-11-06 22:19:15,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271262645185463 [2023-11-06 22:19:15,656 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3420 transitions. [2023-11-06 22:19:15,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3420 transitions. [2023-11-06 22:19:15,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:15,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3420 transitions. [2023-11-06 22:19:15,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 201.1764705882353) internal successors, (3420), 17 states have internal predecessors, (3420), 0 states have call successors, (0), 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 22:19:15,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:15,676 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:15,677 INFO L175 Difference]: Start difference. First operand has 226 places, 323 transitions, 5431 flow. Second operand 17 states and 3420 transitions. [2023-11-06 22:19:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 382 transitions, 7304 flow [2023-11-06 22:19:15,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 382 transitions, 6506 flow, removed 389 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:15,969 INFO L231 Difference]: Finished difference. Result has 240 places, 349 transitions, 5878 flow [2023-11-06 22:19:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5878, PETRI_PLACES=240, PETRI_TRANSITIONS=349} [2023-11-06 22:19:15,971 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2023-11-06 22:19:15,971 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 349 transitions, 5878 flow [2023-11-06 22:19:15,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.08333333333334) internal successors, (2377), 12 states have internal predecessors, (2377), 0 states have call successors, (0), 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 22:19:15,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:15,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:15,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:16,179 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 22:19:16,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1991710874, now seen corresponding path program 20 times [2023-11-06 22:19:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:16,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869140666] [2023-11-06 22:19:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:16,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:16,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869140666] [2023-11-06 22:19:16,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869140666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:16,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504876257] [2023-11-06 22:19:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:16,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:16,276 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:16,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:19:16,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:16,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:16,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:16,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504876257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:16,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:19:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184960629] [2023-11-06 22:19:16,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:16,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:16,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 349 transitions, 5878 flow. Second operand has 13 states, 13 states have (on average 197.92307692307693) internal successors, (2573), 13 states have internal predecessors, (2573), 0 states have call successors, (0), 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 22:19:16,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:16,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:16,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:17,226 INFO L124 PetriNetUnfolderBase]: 737/1230 cut-off events. [2023-11-06 22:19:17,227 INFO L125 PetriNetUnfolderBase]: For 33760/33760 co-relation queries the response was YES. [2023-11-06 22:19:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 1230 events. 737/1230 cut-off events. For 33760/33760 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5898 event pairs, 160 based on Foata normal form. 4/1234 useless extension candidates. Maximal degree in co-relation 10875. Up to 1088 conditions per place. [2023-11-06 22:19:17,252 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 306 selfloop transitions, 56 changer transitions 2/364 dead transitions. [2023-11-06 22:19:17,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 364 transitions, 6866 flow [2023-11-06 22:19:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:19:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:19:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2208 transitions. [2023-11-06 22:19:17,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261725535610886 [2023-11-06 22:19:17,259 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2208 transitions. [2023-11-06 22:19:17,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2208 transitions. [2023-11-06 22:19:17,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:17,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2208 transitions. [2023-11-06 22:19:17,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 200.72727272727272) internal successors, (2208), 11 states have internal predecessors, (2208), 0 states have call successors, (0), 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 22:19:17,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:17,273 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:17,273 INFO L175 Difference]: Start difference. First operand has 240 places, 349 transitions, 5878 flow. Second operand 11 states and 2208 transitions. [2023-11-06 22:19:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 364 transitions, 6866 flow [2023-11-06 22:19:17,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 364 transitions, 6376 flow, removed 205 selfloop flow, removed 15 redundant places. [2023-11-06 22:19:17,625 INFO L231 Difference]: Finished difference. Result has 236 places, 348 transitions, 5515 flow [2023-11-06 22:19:17,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5515, PETRI_PLACES=236, PETRI_TRANSITIONS=348} [2023-11-06 22:19:17,626 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 216 predicate places. [2023-11-06 22:19:17,626 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 348 transitions, 5515 flow [2023-11-06 22:19:17,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.92307692307693) internal successors, (2573), 13 states have internal predecessors, (2573), 0 states have call successors, (0), 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 22:19:17,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:17,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:17,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:17,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:17,834 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 22:19:17,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1558418462, now seen corresponding path program 21 times [2023-11-06 22:19:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:17,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507319693] [2023-11-06 22:19:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:17,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:17,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507319693] [2023-11-06 22:19:17,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507319693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:17,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24949522] [2023-11-06 22:19:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:17,924 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:19:18,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:19:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:18,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:18,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:18,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24949522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:18,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949303848] [2023-11-06 22:19:18,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:18,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:18,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 348 transitions, 5515 flow. Second operand has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:18,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:18,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:18,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:18,906 INFO L124 PetriNetUnfolderBase]: 735/1228 cut-off events. [2023-11-06 22:19:18,906 INFO L125 PetriNetUnfolderBase]: For 32481/32481 co-relation queries the response was YES. [2023-11-06 22:19:18,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10684 conditions, 1228 events. 735/1228 cut-off events. For 32481/32481 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5897 event pairs, 86 based on Foata normal form. 4/1232 useless extension candidates. Maximal degree in co-relation 10527. Up to 746 conditions per place. [2023-11-06 22:19:18,934 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 226 selfloop transitions, 140 changer transitions 2/368 dead transitions. [2023-11-06 22:19:18,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 368 transitions, 6593 flow [2023-11-06 22:19:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:19:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:19:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2413 transitions. [2023-11-06 22:19:18,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42692852087756544 [2023-11-06 22:19:18,940 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2413 transitions. [2023-11-06 22:19:18,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2413 transitions. [2023-11-06 22:19:18,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:18,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2413 transitions. [2023-11-06 22:19:18,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.08333333333334) internal successors, (2413), 12 states have internal predecessors, (2413), 0 states have call successors, (0), 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 22:19:18,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:18,954 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:18,954 INFO L175 Difference]: Start difference. First operand has 236 places, 348 transitions, 5515 flow. Second operand 12 states and 2413 transitions. [2023-11-06 22:19:18,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 368 transitions, 6593 flow [2023-11-06 22:19:19,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 368 transitions, 6484 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:19,256 INFO L231 Difference]: Finished difference. Result has 241 places, 347 transitions, 5706 flow [2023-11-06 22:19:19,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=5397, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5706, PETRI_PLACES=241, PETRI_TRANSITIONS=347} [2023-11-06 22:19:19,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 221 predicate places. [2023-11-06 22:19:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 347 transitions, 5706 flow [2023-11-06 22:19:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:19,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:19,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:19,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-06 22:19:19,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:19,463 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 22:19:19,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1420539840, now seen corresponding path program 22 times [2023-11-06 22:19:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483846903] [2023-11-06 22:19:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:19,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483846903] [2023-11-06 22:19:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483846903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413010096] [2023-11-06 22:19:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:19,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:19,561 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:19,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:19:19,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:19,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:19,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:19,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:19,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413010096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:19,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:19,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:19,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105513163] [2023-11-06 22:19:19,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:19,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:19,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:19,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:19,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 347 transitions, 5706 flow. Second operand has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:19:19,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:19,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:19,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:20,634 INFO L124 PetriNetUnfolderBase]: 777/1290 cut-off events. [2023-11-06 22:19:20,635 INFO L125 PetriNetUnfolderBase]: For 38103/38103 co-relation queries the response was YES. [2023-11-06 22:19:20,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11647 conditions, 1290 events. 777/1290 cut-off events. For 38103/38103 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6222 event pairs, 162 based on Foata normal form. 4/1294 useless extension candidates. Maximal degree in co-relation 11489. Up to 1100 conditions per place. [2023-11-06 22:19:20,671 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 305 selfloop transitions, 80 changer transitions 4/389 dead transitions. [2023-11-06 22:19:20,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 389 transitions, 7226 flow [2023-11-06 22:19:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2805 transitions. [2023-11-06 22:19:20,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42538671519563237 [2023-11-06 22:19:20,681 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2805 transitions. [2023-11-06 22:19:20,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2805 transitions. [2023-11-06 22:19:20,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:20,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2805 transitions. [2023-11-06 22:19:20,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 200.35714285714286) internal successors, (2805), 14 states have internal predecessors, (2805), 0 states have call successors, (0), 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 22:19:20,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:20,702 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:20,702 INFO L175 Difference]: Start difference. First operand has 241 places, 347 transitions, 5706 flow. Second operand 14 states and 2805 transitions. [2023-11-06 22:19:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 389 transitions, 7226 flow [2023-11-06 22:19:20,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 389 transitions, 6871 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-06 22:19:21,002 INFO L231 Difference]: Finished difference. Result has 248 places, 367 transitions, 6054 flow [2023-11-06 22:19:21,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6054, PETRI_PLACES=248, PETRI_TRANSITIONS=367} [2023-11-06 22:19:21,003 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-11-06 22:19:21,003 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 367 transitions, 6054 flow [2023-11-06 22:19:21,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:19:21,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:21,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:21,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-06 22:19:21,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:21,204 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 22:19:21,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash -498523459, now seen corresponding path program 23 times [2023-11-06 22:19:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034393541] [2023-11-06 22:19:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034393541] [2023-11-06 22:19:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034393541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458911311] [2023-11-06 22:19:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:21,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:21,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:19:21,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:21,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:21,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:21,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:21,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:21,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458911311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:21,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:21,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:19:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657303205] [2023-11-06 22:19:21,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:21,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:21,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 367 transitions, 6054 flow. Second operand has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:21,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:21,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:21,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:22,343 INFO L124 PetriNetUnfolderBase]: 842/1383 cut-off events. [2023-11-06 22:19:22,343 INFO L125 PetriNetUnfolderBase]: For 45601/45601 co-relation queries the response was YES. [2023-11-06 22:19:22,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12783 conditions, 1383 events. 842/1383 cut-off events. For 45601/45601 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6695 event pairs, 40 based on Foata normal form. 16/1399 useless extension candidates. Maximal degree in co-relation 12567. Up to 931 conditions per place. [2023-11-06 22:19:22,370 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 310 selfloop transitions, 122 changer transitions 2/434 dead transitions. [2023-11-06 22:19:22,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 434 transitions, 8141 flow [2023-11-06 22:19:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2817 transitions. [2023-11-06 22:19:22,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42720655141037306 [2023-11-06 22:19:22,377 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2817 transitions. [2023-11-06 22:19:22,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2817 transitions. [2023-11-06 22:19:22,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:22,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2817 transitions. [2023-11-06 22:19:22,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 201.21428571428572) internal successors, (2817), 14 states have internal predecessors, (2817), 0 states have call successors, (0), 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 22:19:22,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:22,392 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:22,392 INFO L175 Difference]: Start difference. First operand has 248 places, 367 transitions, 6054 flow. Second operand 14 states and 2817 transitions. [2023-11-06 22:19:22,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 434 transitions, 8141 flow [2023-11-06 22:19:22,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 434 transitions, 8003 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-11-06 22:19:22,804 INFO L231 Difference]: Finished difference. Result has 260 places, 401 transitions, 7114 flow [2023-11-06 22:19:22,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7114, PETRI_PLACES=260, PETRI_TRANSITIONS=401} [2023-11-06 22:19:22,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2023-11-06 22:19:22,806 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 401 transitions, 7114 flow [2023-11-06 22:19:22,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:22,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:22,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:22,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:23,014 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 22:19:23,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1032727232, now seen corresponding path program 24 times [2023-11-06 22:19:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666905870] [2023-11-06 22:19:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:23,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666905870] [2023-11-06 22:19:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666905870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000443391] [2023-11-06 22:19:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:23,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:23,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:23,108 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:23,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:19:23,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:19:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:23,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:23,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:23,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:23,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000443391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:23,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:23,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:19:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58843485] [2023-11-06 22:19:23,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:23,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:23,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:23,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:23,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 401 transitions, 7114 flow. Second operand has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:23,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:23,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:23,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:24,113 INFO L124 PetriNetUnfolderBase]: 840/1377 cut-off events. [2023-11-06 22:19:24,113 INFO L125 PetriNetUnfolderBase]: For 48560/48560 co-relation queries the response was YES. [2023-11-06 22:19:24,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 1377 events. 840/1377 cut-off events. For 48560/48560 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6609 event pairs, 113 based on Foata normal form. 2/1379 useless extension candidates. Maximal degree in co-relation 12977. Up to 935 conditions per place. [2023-11-06 22:19:24,133 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 299 selfloop transitions, 117 changer transitions 4/420 dead transitions. [2023-11-06 22:19:24,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 420 transitions, 8341 flow [2023-11-06 22:19:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:19:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:19:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2009 transitions. [2023-11-06 22:19:24,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653927813163484 [2023-11-06 22:19:24,137 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2009 transitions. [2023-11-06 22:19:24,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2009 transitions. [2023-11-06 22:19:24,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:24,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2009 transitions. [2023-11-06 22:19:24,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.9) internal successors, (2009), 10 states have internal predecessors, (2009), 0 states have call successors, (0), 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 22:19:24,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:24,146 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:24,146 INFO L175 Difference]: Start difference. First operand has 260 places, 401 transitions, 7114 flow. Second operand 10 states and 2009 transitions. [2023-11-06 22:19:24,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 420 transitions, 8341 flow [2023-11-06 22:19:24,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 420 transitions, 7744 flow, removed 236 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:24,516 INFO L231 Difference]: Finished difference. Result has 263 places, 400 transitions, 6801 flow [2023-11-06 22:19:24,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6801, PETRI_PLACES=263, PETRI_TRANSITIONS=400} [2023-11-06 22:19:24,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 243 predicate places. [2023-11-06 22:19:24,517 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 400 transitions, 6801 flow [2023-11-06 22:19:24,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:24,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:24,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:24,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 22:19:24,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:24,718 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 22:19:24,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1395702118, now seen corresponding path program 25 times [2023-11-06 22:19:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:24,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022253136] [2023-11-06 22:19:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:24,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022253136] [2023-11-06 22:19:24,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022253136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:24,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125256033] [2023-11-06 22:19:24,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:24,802 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:24,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:19:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:24,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:24,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:24,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125256033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:24,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:24,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:19:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257027710] [2023-11-06 22:19:24,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:19:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:19:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:19:25,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:25,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 400 transitions, 6801 flow. Second operand has 11 states, 11 states have (on average 198.0909090909091) internal successors, (2179), 11 states have internal predecessors, (2179), 0 states have call successors, (0), 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 22:19:25,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:25,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:25,553 INFO L124 PetriNetUnfolderBase]: 836/1369 cut-off events. [2023-11-06 22:19:25,553 INFO L125 PetriNetUnfolderBase]: For 45499/45499 co-relation queries the response was YES. [2023-11-06 22:19:25,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12805 conditions, 1369 events. 836/1369 cut-off events. For 45499/45499 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6565 event pairs, 112 based on Foata normal form. 2/1371 useless extension candidates. Maximal degree in co-relation 12703. Up to 924 conditions per place. [2023-11-06 22:19:25,570 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 307 selfloop transitions, 100 changer transitions 6/413 dead transitions. [2023-11-06 22:19:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 413 transitions, 7798 flow [2023-11-06 22:19:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1408 transitions. [2023-11-06 22:19:25,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427054898392478 [2023-11-06 22:19:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1408 transitions. [2023-11-06 22:19:25,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1408 transitions. [2023-11-06 22:19:25,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:25,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1408 transitions. [2023-11-06 22:19:25,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 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 22:19:25,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:25,580 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 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 22:19:25,580 INFO L175 Difference]: Start difference. First operand has 263 places, 400 transitions, 6801 flow. Second operand 7 states and 1408 transitions. [2023-11-06 22:19:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 413 transitions, 7798 flow [2023-11-06 22:19:25,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 413 transitions, 7525 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-06 22:19:25,864 INFO L231 Difference]: Finished difference. Result has 259 places, 397 transitions, 6682 flow [2023-11-06 22:19:25,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6682, PETRI_PLACES=259, PETRI_TRANSITIONS=397} [2023-11-06 22:19:25,865 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-11-06 22:19:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 397 transitions, 6682 flow [2023-11-06 22:19:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 198.0909090909091) internal successors, (2179), 11 states have internal predecessors, (2179), 0 states have call successors, (0), 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 22:19:25,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:25,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:25,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-06 22:19:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:19:26,067 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 22:19:26,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash 718756863, now seen corresponding path program 26 times [2023-11-06 22:19:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:26,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349736404] [2023-11-06 22:19:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:26,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:26,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349736404] [2023-11-06 22:19:26,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349736404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:26,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790122488] [2023-11-06 22:19:26,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:26,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:26,157 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:26,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:19:26,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:26,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:26,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:26,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790122488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:26,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:26,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820694902] [2023-11-06 22:19:26,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:26,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:26,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:26,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:26,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 397 transitions, 6682 flow. Second operand has 15 states, 15 states have (on average 197.73333333333332) internal successors, (2966), 15 states have internal predecessors, (2966), 0 states have call successors, (0), 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 22:19:26,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:26,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:26,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:27,125 INFO L124 PetriNetUnfolderBase]: 886/1447 cut-off events. [2023-11-06 22:19:27,125 INFO L125 PetriNetUnfolderBase]: For 48891/48891 co-relation queries the response was YES. [2023-11-06 22:19:27,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13539 conditions, 1447 events. 886/1447 cut-off events. For 48891/48891 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6989 event pairs, 33 based on Foata normal form. 12/1459 useless extension candidates. Maximal degree in co-relation 13437. Up to 923 conditions per place. [2023-11-06 22:19:27,146 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 326 selfloop transitions, 134 changer transitions 5/465 dead transitions. [2023-11-06 22:19:27,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 465 transitions, 8561 flow [2023-11-06 22:19:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3419 transitions. [2023-11-06 22:19:27,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270013737979268 [2023-11-06 22:19:27,153 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3419 transitions. [2023-11-06 22:19:27,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3419 transitions. [2023-11-06 22:19:27,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:27,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3419 transitions. [2023-11-06 22:19:27,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 201.11764705882354) internal successors, (3419), 17 states have internal predecessors, (3419), 0 states have call successors, (0), 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 22:19:27,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:27,173 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:27,173 INFO L175 Difference]: Start difference. First operand has 259 places, 397 transitions, 6682 flow. Second operand 17 states and 3419 transitions. [2023-11-06 22:19:27,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 465 transitions, 8561 flow [2023-11-06 22:19:27,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 465 transitions, 8355 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-06 22:19:27,588 INFO L231 Difference]: Finished difference. Result has 268 places, 421 transitions, 7382 flow [2023-11-06 22:19:27,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7382, PETRI_PLACES=268, PETRI_TRANSITIONS=421} [2023-11-06 22:19:27,589 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-11-06 22:19:27,589 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 421 transitions, 7382 flow [2023-11-06 22:19:27,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.73333333333332) internal successors, (2966), 15 states have internal predecessors, (2966), 0 states have call successors, (0), 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 22:19:27,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:27,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:27,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:19:27,791 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 22:19:27,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1914493037, now seen corresponding path program 27 times [2023-11-06 22:19:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619568940] [2023-11-06 22:19:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:27,885 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 22:19:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619568940] [2023-11-06 22:19:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619568940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:27,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188283214] [2023-11-06 22:19:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:27,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:27,889 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:27,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:19:28,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:19:28,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:28,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:28,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:28,095 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 22:19:28,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:28,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188283214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:28,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:28,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:19:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499270480] [2023-11-06 22:19:28,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:28,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:28,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:28,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:28,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 421 transitions, 7382 flow. Second operand has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 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 22:19:28,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:28,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:28,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:28,924 INFO L124 PetriNetUnfolderBase]: 907/1478 cut-off events. [2023-11-06 22:19:28,924 INFO L125 PetriNetUnfolderBase]: For 51517/51517 co-relation queries the response was YES. [2023-11-06 22:19:28,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14074 conditions, 1478 events. 907/1478 cut-off events. For 51517/51517 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7156 event pairs, 38 based on Foata normal form. 18/1496 useless extension candidates. Maximal degree in co-relation 13971. Up to 1059 conditions per place. [2023-11-06 22:19:28,947 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 343 selfloop transitions, 122 changer transitions 0/465 dead transitions. [2023-11-06 22:19:28,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 465 transitions, 8955 flow [2023-11-06 22:19:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3413 transitions. [2023-11-06 22:19:28,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262520294742101 [2023-11-06 22:19:28,952 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3413 transitions. [2023-11-06 22:19:28,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3413 transitions. [2023-11-06 22:19:28,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:28,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3413 transitions. [2023-11-06 22:19:28,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.76470588235293) internal successors, (3413), 17 states have internal predecessors, (3413), 0 states have call successors, (0), 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 22:19:28,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:28,968 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:28,968 INFO L175 Difference]: Start difference. First operand has 268 places, 421 transitions, 7382 flow. Second operand 17 states and 3413 transitions. [2023-11-06 22:19:28,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 465 transitions, 8955 flow [2023-11-06 22:19:29,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 465 transitions, 8525 flow, removed 161 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:29,427 INFO L231 Difference]: Finished difference. Result has 282 places, 437 transitions, 7578 flow [2023-11-06 22:19:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7578, PETRI_PLACES=282, PETRI_TRANSITIONS=437} [2023-11-06 22:19:29,428 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-11-06 22:19:29,428 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 437 transitions, 7578 flow [2023-11-06 22:19:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 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 22:19:29,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:29,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:29,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-06 22:19:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:29,629 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 22:19:29,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash -184256411, now seen corresponding path program 28 times [2023-11-06 22:19:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:29,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554513783] [2023-11-06 22:19:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:29,714 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 22:19:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554513783] [2023-11-06 22:19:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554513783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758047017] [2023-11-06 22:19:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:29,717 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:29,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:19:29,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:29,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:29,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:29,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:29,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:29,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758047017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:29,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:29,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:29,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517430581] [2023-11-06 22:19:29,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:29,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:29,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:30,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:30,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 437 transitions, 7578 flow. Second operand has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:19:30,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:30,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:30,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:30,807 INFO L124 PetriNetUnfolderBase]: 938/1531 cut-off events. [2023-11-06 22:19:30,807 INFO L125 PetriNetUnfolderBase]: For 52003/52003 co-relation queries the response was YES. [2023-11-06 22:19:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 1531 events. 938/1531 cut-off events. For 52003/52003 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7532 event pairs, 38 based on Foata normal form. 6/1537 useless extension candidates. Maximal degree in co-relation 14323. Up to 1061 conditions per place. [2023-11-06 22:19:30,830 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 347 selfloop transitions, 142 changer transitions 0/489 dead transitions. [2023-11-06 22:19:30,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 489 transitions, 9388 flow [2023-11-06 22:19:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:19:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:19:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4602 transitions. [2023-11-06 22:19:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42481307117142064 [2023-11-06 22:19:30,836 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4602 transitions. [2023-11-06 22:19:30,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4602 transitions. [2023-11-06 22:19:30,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:30,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4602 transitions. [2023-11-06 22:19:30,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 200.08695652173913) internal successors, (4602), 23 states have internal predecessors, (4602), 0 states have call successors, (0), 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 22:19:30,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 471.0) internal successors, (11304), 24 states have internal predecessors, (11304), 0 states have call successors, (0), 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 22:19:30,852 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 471.0) internal successors, (11304), 24 states have internal predecessors, (11304), 0 states have call successors, (0), 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 22:19:30,853 INFO L175 Difference]: Start difference. First operand has 282 places, 437 transitions, 7578 flow. Second operand 23 states and 4602 transitions. [2023-11-06 22:19:30,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 489 transitions, 9388 flow [2023-11-06 22:19:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 489 transitions, 8981 flow, removed 116 selfloop flow, removed 9 redundant places. [2023-11-06 22:19:31,273 INFO L231 Difference]: Finished difference. Result has 299 places, 457 transitions, 7999 flow [2023-11-06 22:19:31,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=7282, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7999, PETRI_PLACES=299, PETRI_TRANSITIONS=457} [2023-11-06 22:19:31,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 279 predicate places. [2023-11-06 22:19:31,274 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 457 transitions, 7999 flow [2023-11-06 22:19:31,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:19:31,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:31,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:31,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-06 22:19:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-06 22:19:31,475 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 22:19:31,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477297, now seen corresponding path program 29 times [2023-11-06 22:19:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:31,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981300410] [2023-11-06 22:19:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981300410] [2023-11-06 22:19:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981300410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540083822] [2023-11-06 22:19:31,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:31,573 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:31,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:19:31,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:31,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:31,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:31,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:31,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540083822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:31,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:31,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:19:31,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122808217] [2023-11-06 22:19:31,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:31,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:31,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:31,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 457 transitions, 7999 flow. Second operand has 13 states, 13 states have (on average 197.92307692307693) internal successors, (2573), 13 states have internal predecessors, (2573), 0 states have call successors, (0), 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 22:19:31,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:31,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:31,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:32,461 INFO L124 PetriNetUnfolderBase]: 960/1565 cut-off events. [2023-11-06 22:19:32,461 INFO L125 PetriNetUnfolderBase]: For 55659/55659 co-relation queries the response was YES. [2023-11-06 22:19:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14871 conditions, 1565 events. 960/1565 cut-off events. For 55659/55659 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7720 event pairs, 42 based on Foata normal form. 12/1577 useless extension candidates. Maximal degree in co-relation 14759. Up to 982 conditions per place. [2023-11-06 22:19:32,483 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 306 selfloop transitions, 195 changer transitions 0/501 dead transitions. [2023-11-06 22:19:32,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 501 transitions, 9720 flow [2023-11-06 22:19:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:19:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:19:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3414 transitions. [2023-11-06 22:19:32,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42637692019482953 [2023-11-06 22:19:32,488 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3414 transitions. [2023-11-06 22:19:32,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3414 transitions. [2023-11-06 22:19:32,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:32,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3414 transitions. [2023-11-06 22:19:32,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.8235294117647) internal successors, (3414), 17 states have internal predecessors, (3414), 0 states have call successors, (0), 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 22:19:32,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:32,501 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:19:32,502 INFO L175 Difference]: Start difference. First operand has 299 places, 457 transitions, 7999 flow. Second operand 17 states and 3414 transitions. [2023-11-06 22:19:32,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 501 transitions, 9720 flow [2023-11-06 22:19:33,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 501 transitions, 9358 flow, removed 117 selfloop flow, removed 11 redundant places. [2023-11-06 22:19:33,114 INFO L231 Difference]: Finished difference. Result has 308 places, 475 transitions, 8522 flow [2023-11-06 22:19:33,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8522, PETRI_PLACES=308, PETRI_TRANSITIONS=475} [2023-11-06 22:19:33,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 288 predicate places. [2023-11-06 22:19:33,115 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 475 transitions, 8522 flow [2023-11-06 22:19:33,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.92307692307693) internal successors, (2573), 13 states have internal predecessors, (2573), 0 states have call successors, (0), 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 22:19:33,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:33,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:33,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:33,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:33,322 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 22:19:33,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 494451839, now seen corresponding path program 30 times [2023-11-06 22:19:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404506250] [2023-11-06 22:19:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:33,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:33,412 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 22:19:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404506250] [2023-11-06 22:19:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404506250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653973136] [2023-11-06 22:19:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:33,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:33,415 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:33,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:19:33,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:19:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:33,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:33,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:33,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:33,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653973136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:33,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:19:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215462575] [2023-11-06 22:19:33,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:33,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:19:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:19:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:19:33,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 475 transitions, 8522 flow. Second operand has 11 states, 11 states have (on average 198.0909090909091) internal successors, (2179), 11 states have internal predecessors, (2179), 0 states have call successors, (0), 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 22:19:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:34,387 INFO L124 PetriNetUnfolderBase]: 1003/1640 cut-off events. [2023-11-06 22:19:34,387 INFO L125 PetriNetUnfolderBase]: For 58065/58065 co-relation queries the response was YES. [2023-11-06 22:19:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15823 conditions, 1640 events. 1003/1640 cut-off events. For 58065/58065 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8202 event pairs, 12 based on Foata normal form. 8/1648 useless extension candidates. Maximal degree in co-relation 15707. Up to 822 conditions per place. [2023-11-06 22:19:34,415 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 331 selfloop transitions, 198 changer transitions 0/529 dead transitions. [2023-11-06 22:19:34,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 529 transitions, 10507 flow [2023-11-06 22:19:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:19:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:19:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2015 transitions. [2023-11-06 22:19:34,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278131634819533 [2023-11-06 22:19:34,418 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2015 transitions. [2023-11-06 22:19:34,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2015 transitions. [2023-11-06 22:19:34,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:34,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2015 transitions. [2023-11-06 22:19:34,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.5) internal successors, (2015), 10 states have internal predecessors, (2015), 0 states have call successors, (0), 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 22:19:34,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:34,423 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:19:34,423 INFO L175 Difference]: Start difference. First operand has 308 places, 475 transitions, 8522 flow. Second operand 10 states and 2015 transitions. [2023-11-06 22:19:34,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 529 transitions, 10507 flow [2023-11-06 22:19:34,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 529 transitions, 9967 flow, removed 100 selfloop flow, removed 13 redundant places. [2023-11-06 22:19:34,933 INFO L231 Difference]: Finished difference. Result has 308 places, 498 transitions, 8866 flow [2023-11-06 22:19:34,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=7938, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8866, PETRI_PLACES=308, PETRI_TRANSITIONS=498} [2023-11-06 22:19:34,934 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 288 predicate places. [2023-11-06 22:19:34,935 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 498 transitions, 8866 flow [2023-11-06 22:19:34,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 198.0909090909091) internal successors, (2179), 11 states have internal predecessors, (2179), 0 states have call successors, (0), 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 22:19:34,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:34,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:34,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-06 22:19:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:35,136 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 22:19:35,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -58219163, now seen corresponding path program 31 times [2023-11-06 22:19:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354785219] [2023-11-06 22:19:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:35,227 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 22:19:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354785219] [2023-11-06 22:19:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354785219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805420312] [2023-11-06 22:19:35,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:35,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:35,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:35,233 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:35,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:19:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:35,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:35,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:35,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:35,467 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 22:19:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805420312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:35,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:35,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:19:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716004505] [2023-11-06 22:19:35,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:19:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:19:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:19:35,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:35,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 498 transitions, 8866 flow. Second operand has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:35,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:35,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:35,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:36,720 INFO L124 PetriNetUnfolderBase]: 1042/1707 cut-off events. [2023-11-06 22:19:36,720 INFO L125 PetriNetUnfolderBase]: For 59073/59073 co-relation queries the response was YES. [2023-11-06 22:19:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 1707 events. 1042/1707 cut-off events. For 59073/59073 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8639 event pairs, 50 based on Foata normal form. 4/1711 useless extension candidates. Maximal degree in co-relation 16275. Up to 1152 conditions per place. [2023-11-06 22:19:36,750 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 390 selfloop transitions, 155 changer transitions 0/545 dead transitions. [2023-11-06 22:19:36,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 545 transitions, 10670 flow [2023-11-06 22:19:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2806 transitions. [2023-11-06 22:19:36,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255383682135275 [2023-11-06 22:19:36,754 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2806 transitions. [2023-11-06 22:19:36,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2806 transitions. [2023-11-06 22:19:36,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:36,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2806 transitions. [2023-11-06 22:19:36,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 200.42857142857142) internal successors, (2806), 14 states have internal predecessors, (2806), 0 states have call successors, (0), 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 22:19:36,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:36,760 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 471.0) internal successors, (7065), 15 states have internal predecessors, (7065), 0 states have call successors, (0), 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 22:19:36,761 INFO L175 Difference]: Start difference. First operand has 308 places, 498 transitions, 8866 flow. Second operand 14 states and 2806 transitions. [2023-11-06 22:19:36,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 545 transitions, 10670 flow [2023-11-06 22:19:37,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 545 transitions, 10387 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:37,191 INFO L231 Difference]: Finished difference. Result has 320 places, 521 transitions, 9375 flow [2023-11-06 22:19:37,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9375, PETRI_PLACES=320, PETRI_TRANSITIONS=521} [2023-11-06 22:19:37,193 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 300 predicate places. [2023-11-06 22:19:37,193 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 521 transitions, 9375 flow [2023-11-06 22:19:37,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.07692307692307) internal successors, (2575), 13 states have internal predecessors, (2575), 0 states have call successors, (0), 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 22:19:37,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:37,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:37,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 22:19:37,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-06 22:19:37,394 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 22:19:37,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1752425115, now seen corresponding path program 32 times [2023-11-06 22:19:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:37,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357163285] [2023-11-06 22:19:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357163285] [2023-11-06 22:19:37,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357163285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873097010] [2023-11-06 22:19:37,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:37,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:37,473 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:37,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:19:37,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:37,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:37,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:37,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873097010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:37,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:37,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792534220] [2023-11-06 22:19:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:37,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 521 transitions, 9375 flow. Second operand has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:37,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:37,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:37,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:38,504 INFO L124 PetriNetUnfolderBase]: 1079/1760 cut-off events. [2023-11-06 22:19:38,504 INFO L125 PetriNetUnfolderBase]: For 61427/61427 co-relation queries the response was YES. [2023-11-06 22:19:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17132 conditions, 1760 events. 1079/1760 cut-off events. For 61427/61427 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9011 event pairs, 69 based on Foata normal form. 8/1768 useless extension candidates. Maximal degree in co-relation 17009. Up to 1036 conditions per place. [2023-11-06 22:19:38,535 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 384 selfloop transitions, 182 changer transitions 1/567 dead transitions. [2023-11-06 22:19:38,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 567 transitions, 11279 flow [2023-11-06 22:19:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:19:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:19:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2617 transitions. [2023-11-06 22:19:38,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42740486689531276 [2023-11-06 22:19:38,539 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2617 transitions. [2023-11-06 22:19:38,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2617 transitions. [2023-11-06 22:19:38,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:38,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2617 transitions. [2023-11-06 22:19:38,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 201.30769230769232) internal successors, (2617), 13 states have internal predecessors, (2617), 0 states have call successors, (0), 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 22:19:38,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:19:38,545 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:19:38,545 INFO L175 Difference]: Start difference. First operand has 320 places, 521 transitions, 9375 flow. Second operand 13 states and 2617 transitions. [2023-11-06 22:19:38,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 567 transitions, 11279 flow [2023-11-06 22:19:39,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 567 transitions, 11099 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:39,090 INFO L231 Difference]: Finished difference. Result has 330 places, 538 transitions, 10065 flow [2023-11-06 22:19:39,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=9185, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10065, PETRI_PLACES=330, PETRI_TRANSITIONS=538} [2023-11-06 22:19:39,091 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-11-06 22:19:39,091 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 538 transitions, 10065 flow [2023-11-06 22:19:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:39,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:39,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:39,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:39,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 22:19:39,301 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:39,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -311276269, now seen corresponding path program 33 times [2023-11-06 22:19:39,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:39,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933993105] [2023-11-06 22:19:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:39,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933993105] [2023-11-06 22:19:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933993105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409754750] [2023-11-06 22:19:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:39,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:39,376 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:19:39,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:19:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:39,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:39,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:39,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409754750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:39,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:19:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287171368] [2023-11-06 22:19:39,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:39,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:19:39,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 538 transitions, 10065 flow. Second operand has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:39,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:39,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:19:39,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:40,650 INFO L124 PetriNetUnfolderBase]: 1071/1746 cut-off events. [2023-11-06 22:19:40,650 INFO L125 PetriNetUnfolderBase]: For 64549/64549 co-relation queries the response was YES. [2023-11-06 22:19:40,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17362 conditions, 1746 events. 1071/1746 cut-off events. For 64549/64549 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8858 event pairs, 44 based on Foata normal form. 10/1756 useless extension candidates. Maximal degree in co-relation 17235. Up to 1047 conditions per place. [2023-11-06 22:19:40,680 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 355 selfloop transitions, 210 changer transitions 0/565 dead transitions. [2023-11-06 22:19:40,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 565 transitions, 11544 flow [2023-11-06 22:19:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:19:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:19:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3211 transitions. [2023-11-06 22:19:40,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426088110403397 [2023-11-06 22:19:40,684 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3211 transitions. [2023-11-06 22:19:40,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3211 transitions. [2023-11-06 22:19:40,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:40,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3211 transitions. [2023-11-06 22:19:40,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 200.6875) internal successors, (3211), 16 states have internal predecessors, (3211), 0 states have call successors, (0), 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 22:19:40,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:40,697 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 471.0) internal successors, (8007), 17 states have internal predecessors, (8007), 0 states have call successors, (0), 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 22:19:40,697 INFO L175 Difference]: Start difference. First operand has 330 places, 538 transitions, 10065 flow. Second operand 16 states and 3211 transitions. [2023-11-06 22:19:40,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 565 transitions, 11544 flow [2023-11-06 22:19:41,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 565 transitions, 11314 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:41,209 INFO L231 Difference]: Finished difference. Result has 335 places, 538 transitions, 10309 flow [2023-11-06 22:19:41,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=9671, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10309, PETRI_PLACES=335, PETRI_TRANSITIONS=538} [2023-11-06 22:19:41,210 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 315 predicate places. [2023-11-06 22:19:41,210 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 538 transitions, 10309 flow [2023-11-06 22:19:41,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 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 22:19:41,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:41,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:41,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-06 22:19:41,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 22:19:41,411 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:41,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2002303230, now seen corresponding path program 34 times [2023-11-06 22:19:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:41,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536985534] [2023-11-06 22:19:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:41,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:41,668 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 22:19:41,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536985534] [2023-11-06 22:19:41,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536985534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741629580] [2023-11-06 22:19:41,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:41,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:41,670 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:41,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:19:41,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:41,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:41,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:41,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:41,943 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 22:19:41,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:42,243 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 22:19:42,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741629580] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:42,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:42,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:42,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068191177] [2023-11-06 22:19:42,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:42,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:19:42,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:19:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:19:42,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:42,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 538 transitions, 10309 flow. Second operand has 17 states, 17 states have (on average 192.05882352941177) internal successors, (3265), 17 states have internal predecessors, (3265), 0 states have call successors, (0), 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 22:19:42,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:42,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:42,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:44,132 INFO L124 PetriNetUnfolderBase]: 1245/2084 cut-off events. [2023-11-06 22:19:44,132 INFO L125 PetriNetUnfolderBase]: For 80061/80064 co-relation queries the response was YES. [2023-11-06 22:19:44,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21170 conditions, 2084 events. 1245/2084 cut-off events. For 80061/80064 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 11480 event pairs, 26 based on Foata normal form. 2/2081 useless extension candidates. Maximal degree in co-relation 21043. Up to 1600 conditions per place. [2023-11-06 22:19:44,184 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 534 selfloop transitions, 107 changer transitions 14/665 dead transitions. [2023-11-06 22:19:44,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 665 transitions, 13548 flow [2023-11-06 22:19:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:19:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:19:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2167 transitions. [2023-11-06 22:19:44,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182590233545648 [2023-11-06 22:19:44,188 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2167 transitions. [2023-11-06 22:19:44,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2167 transitions. [2023-11-06 22:19:44,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:44,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2167 transitions. [2023-11-06 22:19:44,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 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 22:19:44,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:44,195 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:44,196 INFO L175 Difference]: Start difference. First operand has 335 places, 538 transitions, 10309 flow. Second operand 11 states and 2167 transitions. [2023-11-06 22:19:44,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 665 transitions, 13548 flow [2023-11-06 22:19:44,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 665 transitions, 13029 flow, removed 42 selfloop flow, removed 12 redundant places. [2023-11-06 22:19:44,726 INFO L231 Difference]: Finished difference. Result has 342 places, 596 transitions, 11416 flow [2023-11-06 22:19:44,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=9832, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11416, PETRI_PLACES=342, PETRI_TRANSITIONS=596} [2023-11-06 22:19:44,728 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 322 predicate places. [2023-11-06 22:19:44,728 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 596 transitions, 11416 flow [2023-11-06 22:19:44,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 192.05882352941177) internal successors, (3265), 17 states have internal predecessors, (3265), 0 states have call successors, (0), 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 22:19:44,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:44,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:44,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 22:19:44,935 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:44,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 331336390, now seen corresponding path program 35 times [2023-11-06 22:19:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:44,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773795439] [2023-11-06 22:19:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:45,241 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 22:19:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773795439] [2023-11-06 22:19:45,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773795439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669979076] [2023-11-06 22:19:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:45,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:45,246 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:45,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:19:45,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:45,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:45,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:45,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:45,548 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 22:19:45,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:45,825 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 22:19:45,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669979076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:45,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:45,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:19:45,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883058760] [2023-11-06 22:19:45,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:45,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:19:45,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:45,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:19:45,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:19:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:46,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 596 transitions, 11416 flow. Second operand has 15 states, 15 states have (on average 191.93333333333334) internal successors, (2879), 15 states have internal predecessors, (2879), 0 states have call successors, (0), 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 22:19:46,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:46,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:47,466 INFO L124 PetriNetUnfolderBase]: 1261/2120 cut-off events. [2023-11-06 22:19:47,466 INFO L125 PetriNetUnfolderBase]: For 83694/83697 co-relation queries the response was YES. [2023-11-06 22:19:47,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21686 conditions, 2120 events. 1261/2120 cut-off events. For 83694/83697 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 11789 event pairs, 26 based on Foata normal form. 2/2117 useless extension candidates. Maximal degree in co-relation 21551. Up to 1750 conditions per place. [2023-11-06 22:19:47,507 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 531 selfloop transitions, 89 changer transitions 20/650 dead transitions. [2023-11-06 22:19:47,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 650 transitions, 13252 flow [2023-11-06 22:19:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:19:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:19:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2348 transitions. [2023-11-06 22:19:47,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154281670205237 [2023-11-06 22:19:47,511 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2348 transitions. [2023-11-06 22:19:47,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2348 transitions. [2023-11-06 22:19:47,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:47,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2348 transitions. [2023-11-06 22:19:47,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.66666666666666) internal successors, (2348), 12 states have internal predecessors, (2348), 0 states have call successors, (0), 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 22:19:47,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:47,520 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:19:47,521 INFO L175 Difference]: Start difference. First operand has 342 places, 596 transitions, 11416 flow. Second operand 12 states and 2348 transitions. [2023-11-06 22:19:47,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 650 transitions, 13252 flow [2023-11-06 22:19:48,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 650 transitions, 12814 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:48,194 INFO L231 Difference]: Finished difference. Result has 353 places, 601 transitions, 11416 flow [2023-11-06 22:19:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=11042, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11416, PETRI_PLACES=353, PETRI_TRANSITIONS=601} [2023-11-06 22:19:48,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 333 predicate places. [2023-11-06 22:19:48,195 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 601 transitions, 11416 flow [2023-11-06 22:19:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 191.93333333333334) internal successors, (2879), 15 states have internal predecessors, (2879), 0 states have call successors, (0), 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 22:19:48,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:48,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:48,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:48,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-06 22:19:48,403 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:48,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -934752726, now seen corresponding path program 36 times [2023-11-06 22:19:48,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966272269] [2023-11-06 22:19:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:48,651 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 22:19:48,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966272269] [2023-11-06 22:19:48,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966272269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622293193] [2023-11-06 22:19:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:48,655 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:48,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:19:48,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:19:48,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:48,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:48,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:48,939 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 22:19:48,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:49,219 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 22:19:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622293193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:49,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:49,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:19:49,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063404185] [2023-11-06 22:19:49,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:49,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:19:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:19:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:19:49,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:49,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 601 transitions, 11416 flow. Second operand has 16 states, 16 states have (on average 191.875) internal successors, (3070), 16 states have internal predecessors, (3070), 0 states have call successors, (0), 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 22:19:49,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:49,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:49,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:51,094 INFO L124 PetriNetUnfolderBase]: 1236/2074 cut-off events. [2023-11-06 22:19:51,094 INFO L125 PetriNetUnfolderBase]: For 71965/71968 co-relation queries the response was YES. [2023-11-06 22:19:51,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20742 conditions, 2074 events. 1236/2074 cut-off events. For 71965/71968 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 11431 event pairs, 27 based on Foata normal form. 1/2070 useless extension candidates. Maximal degree in co-relation 20604. Up to 1608 conditions per place. [2023-11-06 22:19:51,135 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 525 selfloop transitions, 107 changer transitions 5/647 dead transitions. [2023-11-06 22:19:51,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 647 transitions, 13128 flow [2023-11-06 22:19:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:19:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:19:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2023-11-06 22:19:51,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184949280490682 [2023-11-06 22:19:51,139 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2023-11-06 22:19:51,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2023-11-06 22:19:51,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:51,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2023-11-06 22:19:51,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 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 22:19:51,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:19:51,146 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:19:51,146 INFO L175 Difference]: Start difference. First operand has 353 places, 601 transitions, 11416 flow. Second operand 9 states and 1774 transitions. [2023-11-06 22:19:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 647 transitions, 13128 flow [2023-11-06 22:19:51,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 647 transitions, 12816 flow, removed 90 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:51,919 INFO L231 Difference]: Finished difference. Result has 354 places, 605 transitions, 11486 flow [2023-11-06 22:19:51,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=11112, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11486, PETRI_PLACES=354, PETRI_TRANSITIONS=605} [2023-11-06 22:19:51,921 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-11-06 22:19:51,921 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 605 transitions, 11486 flow [2023-11-06 22:19:51,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 191.875) internal successors, (3070), 16 states have internal predecessors, (3070), 0 states have call successors, (0), 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 22:19:51,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:51,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:51,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-06 22:19:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 22:19:52,123 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:52,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash 637001650, now seen corresponding path program 37 times [2023-11-06 22:19:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:52,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865040832] [2023-11-06 22:19:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:52,413 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 22:19:52,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:52,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865040832] [2023-11-06 22:19:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865040832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:52,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876341016] [2023-11-06 22:19:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:52,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:52,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:52,417 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:52,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 22:19:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:52,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:52,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:52,743 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 22:19:52,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:52,984 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 22:19:52,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876341016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:52,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:52,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:19:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817085672] [2023-11-06 22:19:52,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:19:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:19:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:19:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:53,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 605 transitions, 11486 flow. Second operand has 17 states, 17 states have (on average 191.8235294117647) internal successors, (3261), 17 states have internal predecessors, (3261), 0 states have call successors, (0), 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 22:19:53,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:53,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:53,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:54,737 INFO L124 PetriNetUnfolderBase]: 1233/2065 cut-off events. [2023-11-06 22:19:54,737 INFO L125 PetriNetUnfolderBase]: For 76281/76284 co-relation queries the response was YES. [2023-11-06 22:19:54,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20373 conditions, 2065 events. 1233/2065 cut-off events. For 76281/76284 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 11361 event pairs, 26 based on Foata normal form. 1/2061 useless extension candidates. Maximal degree in co-relation 20235. Up to 1672 conditions per place. [2023-11-06 22:19:54,776 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 527 selfloop transitions, 107 changer transitions 5/649 dead transitions. [2023-11-06 22:19:54,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 649 transitions, 13113 flow [2023-11-06 22:19:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:19:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:19:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2156 transitions. [2023-11-06 22:19:54,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416135881104034 [2023-11-06 22:19:54,780 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2156 transitions. [2023-11-06 22:19:54,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2156 transitions. [2023-11-06 22:19:54,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:54,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2156 transitions. [2023-11-06 22:19:54,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.0) internal successors, (2156), 11 states have internal predecessors, (2156), 0 states have call successors, (0), 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 22:19:54,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:54,789 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:19:54,789 INFO L175 Difference]: Start difference. First operand has 354 places, 605 transitions, 11486 flow. Second operand 11 states and 2156 transitions. [2023-11-06 22:19:54,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 649 transitions, 13113 flow [2023-11-06 22:19:55,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 649 transitions, 12826 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:55,494 INFO L231 Difference]: Finished difference. Result has 358 places, 611 transitions, 11606 flow [2023-11-06 22:19:55,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=11208, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11606, PETRI_PLACES=358, PETRI_TRANSITIONS=611} [2023-11-06 22:19:55,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 338 predicate places. [2023-11-06 22:19:55,496 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 611 transitions, 11606 flow [2023-11-06 22:19:55,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 191.8235294117647) internal successors, (3261), 17 states have internal predecessors, (3261), 0 states have call successors, (0), 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 22:19:55,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:55,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:55,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-06 22:19:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:55,702 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:55,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash 525137316, now seen corresponding path program 38 times [2023-11-06 22:19:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468919023] [2023-11-06 22:19:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:55,983 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 22:19:55,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:55,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468919023] [2023-11-06 22:19:55,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468919023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:55,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795244677] [2023-11-06 22:19:55,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:55,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:55,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:55,985 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:56,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 22:19:56,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:56,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:56,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:56,312 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 22:19:56,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:56,605 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 22:19:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795244677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:56,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:56,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-11-06 22:19:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958392992] [2023-11-06 22:19:56,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:56,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:19:56,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:19:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:19:57,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:19:57,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 611 transitions, 11606 flow. Second operand has 18 states, 18 states have (on average 192.0) internal successors, (3456), 18 states have internal predecessors, (3456), 0 states have call successors, (0), 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 22:19:57,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:57,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:19:57,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:58,110 INFO L124 PetriNetUnfolderBase]: 1301/2191 cut-off events. [2023-11-06 22:19:58,110 INFO L125 PetriNetUnfolderBase]: For 83301/83304 co-relation queries the response was YES. [2023-11-06 22:19:58,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 2191 events. 1301/2191 cut-off events. For 83301/83304 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 12314 event pairs, 45 based on Foata normal form. 1/2187 useless extension candidates. Maximal degree in co-relation 21510. Up to 1933 conditions per place. [2023-11-06 22:19:58,179 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 577 selfloop transitions, 86 changer transitions 7/680 dead transitions. [2023-11-06 22:19:58,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 680 transitions, 13952 flow [2023-11-06 22:19:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:19:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:19:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1577 transitions. [2023-11-06 22:19:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185244161358811 [2023-11-06 22:19:58,182 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1577 transitions. [2023-11-06 22:19:58,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1577 transitions. [2023-11-06 22:19:58,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:58,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1577 transitions. [2023-11-06 22:19:58,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.125) internal successors, (1577), 8 states have internal predecessors, (1577), 0 states have call successors, (0), 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 22:19:58,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:19:58,188 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:19:58,188 INFO L175 Difference]: Start difference. First operand has 358 places, 611 transitions, 11606 flow. Second operand 8 states and 1577 transitions. [2023-11-06 22:19:58,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 680 transitions, 13952 flow [2023-11-06 22:19:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 680 transitions, 13701 flow, removed 16 selfloop flow, removed 11 redundant places. [2023-11-06 22:19:58,906 INFO L231 Difference]: Finished difference. Result has 357 places, 639 transitions, 12226 flow [2023-11-06 22:19:58,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=11361, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12226, PETRI_PLACES=357, PETRI_TRANSITIONS=639} [2023-11-06 22:19:58,907 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 337 predicate places. [2023-11-06 22:19:58,907 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 639 transitions, 12226 flow [2023-11-06 22:19:58,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.0) internal successors, (3456), 18 states have internal predecessors, (3456), 0 states have call successors, (0), 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 22:19:58,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:58,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:58,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-06 22:19:59,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:59,108 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:59,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 391683246, now seen corresponding path program 39 times [2023-11-06 22:19:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820687268] [2023-11-06 22:19:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:59,352 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 22:19:59,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820687268] [2023-11-06 22:19:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820687268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078124893] [2023-11-06 22:19:59,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:59,357 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:59,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 22:19:59,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:19:59,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:59,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:19:59,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:59,642 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 22:19:59,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:59,942 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 22:19:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078124893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:59,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:59,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-06 22:19:59,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034350088] [2023-11-06 22:19:59,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:19:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:19:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:20:00,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:00,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 639 transitions, 12226 flow. Second operand has 17 states, 17 states have (on average 192.0) internal successors, (3264), 17 states have internal predecessors, (3264), 0 states have call successors, (0), 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 22:20:00,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:00,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:00,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:01,360 INFO L124 PetriNetUnfolderBase]: 1297/2179 cut-off events. [2023-11-06 22:20:01,360 INFO L125 PetriNetUnfolderBase]: For 86382/86385 co-relation queries the response was YES. [2023-11-06 22:20:01,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21687 conditions, 2179 events. 1297/2179 cut-off events. For 86382/86385 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 12180 event pairs, 43 based on Foata normal form. 1/2175 useless extension candidates. Maximal degree in co-relation 21549. Up to 1933 conditions per place. [2023-11-06 22:20:01,403 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 571 selfloop transitions, 86 changer transitions 6/673 dead transitions. [2023-11-06 22:20:01,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 673 transitions, 13895 flow [2023-11-06 22:20:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:20:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:20:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1573 transitions. [2023-11-06 22:20:01,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174628450106157 [2023-11-06 22:20:01,406 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1573 transitions. [2023-11-06 22:20:01,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1573 transitions. [2023-11-06 22:20:01,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:01,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1573 transitions. [2023-11-06 22:20:01,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.625) internal successors, (1573), 8 states have internal predecessors, (1573), 0 states have call successors, (0), 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 22:20:01,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:01,413 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:01,413 INFO L175 Difference]: Start difference. First operand has 357 places, 639 transitions, 12226 flow. Second operand 8 states and 1573 transitions. [2023-11-06 22:20:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 673 transitions, 13895 flow [2023-11-06 22:20:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 673 transitions, 13588 flow, removed 121 selfloop flow, removed 3 redundant places. [2023-11-06 22:20:02,170 INFO L231 Difference]: Finished difference. Result has 362 places, 642 transitions, 12258 flow [2023-11-06 22:20:02,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=11923, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12258, PETRI_PLACES=362, PETRI_TRANSITIONS=642} [2023-11-06 22:20:02,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 342 predicate places. [2023-11-06 22:20:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 642 transitions, 12258 flow [2023-11-06 22:20:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 192.0) internal successors, (3264), 17 states have internal predecessors, (3264), 0 states have call successors, (0), 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 22:20:02,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:02,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:02,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:02,384 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:02,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1184286700, now seen corresponding path program 40 times [2023-11-06 22:20:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516927223] [2023-11-06 22:20:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:02,618 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 22:20:02,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:02,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516927223] [2023-11-06 22:20:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516927223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818303139] [2023-11-06 22:20:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:20:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:02,621 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:02,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 22:20:02,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:20:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:02,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:02,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:02,890 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 22:20:02,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:03,128 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 22:20:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818303139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:03,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:03,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-11-06 22:20:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025372384] [2023-11-06 22:20:03,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:03,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:20:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:20:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:20:03,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:03,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 642 transitions, 12258 flow. Second operand has 15 states, 15 states have (on average 192.2) internal successors, (2883), 15 states have internal predecessors, (2883), 0 states have call successors, (0), 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 22:20:03,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:03,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:03,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:04,582 INFO L124 PetriNetUnfolderBase]: 1290/2166 cut-off events. [2023-11-06 22:20:04,582 INFO L125 PetriNetUnfolderBase]: For 81698/81701 co-relation queries the response was YES. [2023-11-06 22:20:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21486 conditions, 2166 events. 1290/2166 cut-off events. For 81698/81701 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 12059 event pairs, 47 based on Foata normal form. 1/2162 useless extension candidates. Maximal degree in co-relation 21346. Up to 1977 conditions per place. [2023-11-06 22:20:04,624 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 584 selfloop transitions, 70 changer transitions 5/669 dead transitions. [2023-11-06 22:20:04,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 669 transitions, 13760 flow [2023-11-06 22:20:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:20:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:20:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1568 transitions. [2023-11-06 22:20:04,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416135881104034 [2023-11-06 22:20:04,626 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1568 transitions. [2023-11-06 22:20:04,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1568 transitions. [2023-11-06 22:20:04,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:04,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1568 transitions. [2023-11-06 22:20:04,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.0) internal successors, (1568), 8 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 22:20:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:04,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:04,630 INFO L175 Difference]: Start difference. First operand has 362 places, 642 transitions, 12258 flow. Second operand 8 states and 1568 transitions. [2023-11-06 22:20:04,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 669 transitions, 13760 flow [2023-11-06 22:20:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 669 transitions, 13564 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-11-06 22:20:05,618 INFO L231 Difference]: Finished difference. Result has 366 places, 645 transitions, 12342 flow [2023-11-06 22:20:05,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=12064, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12342, PETRI_PLACES=366, PETRI_TRANSITIONS=645} [2023-11-06 22:20:05,619 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 346 predicate places. [2023-11-06 22:20:05,620 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 645 transitions, 12342 flow [2023-11-06 22:20:05,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 192.2) internal successors, (2883), 15 states have internal predecessors, (2883), 0 states have call successors, (0), 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 22:20:05,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:05,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:05,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:05,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-06 22:20:05,821 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:05,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 484126462, now seen corresponding path program 41 times [2023-11-06 22:20:05,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:05,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807437041] [2023-11-06 22:20:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:06,072 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 22:20:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807437041] [2023-11-06 22:20:06,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807437041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:06,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218039861] [2023-11-06 22:20:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:20:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:06,081 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:06,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-06 22:20:06,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:20:06,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:06,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:06,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:06,378 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 22:20:06,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:06,651 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 22:20:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218039861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:06,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 22:20:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085557926] [2023-11-06 22:20:06,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:20:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:20:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:20:07,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:07,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 645 transitions, 12342 flow. Second operand has 19 states, 19 states have (on average 191.8421052631579) internal successors, (3645), 19 states have internal predecessors, (3645), 0 states have call successors, (0), 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 22:20:07,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:07,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:07,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:08,535 INFO L124 PetriNetUnfolderBase]: 1478/2527 cut-off events. [2023-11-06 22:20:08,535 INFO L125 PetriNetUnfolderBase]: For 102770/102773 co-relation queries the response was YES. [2023-11-06 22:20:08,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25314 conditions, 2527 events. 1478/2527 cut-off events. For 102770/102773 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 14904 event pairs, 60 based on Foata normal form. 2/2524 useless extension candidates. Maximal degree in co-relation 25173. Up to 2089 conditions per place. [2023-11-06 22:20:08,578 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 662 selfloop transitions, 109 changer transitions 15/796 dead transitions. [2023-11-06 22:20:08,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 796 transitions, 16580 flow [2023-11-06 22:20:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:20:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:20:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2172 transitions. [2023-11-06 22:20:08,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41922408801389693 [2023-11-06 22:20:08,581 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2172 transitions. [2023-11-06 22:20:08,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2172 transitions. [2023-11-06 22:20:08,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:08,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2172 transitions. [2023-11-06 22:20:08,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.45454545454547) internal successors, (2172), 11 states have internal predecessors, (2172), 0 states have call successors, (0), 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 22:20:08,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:20:08,586 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:20:08,586 INFO L175 Difference]: Start difference. First operand has 366 places, 645 transitions, 12342 flow. Second operand 11 states and 2172 transitions. [2023-11-06 22:20:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 796 transitions, 16580 flow [2023-11-06 22:20:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 796 transitions, 16301 flow, removed 61 selfloop flow, removed 7 redundant places. [2023-11-06 22:20:09,546 INFO L231 Difference]: Finished difference. Result has 377 places, 711 transitions, 14072 flow [2023-11-06 22:20:09,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=12077, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14072, PETRI_PLACES=377, PETRI_TRANSITIONS=711} [2023-11-06 22:20:09,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 357 predicate places. [2023-11-06 22:20:09,547 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 711 transitions, 14072 flow [2023-11-06 22:20:09,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 191.8421052631579) internal successors, (3645), 19 states have internal predecessors, (3645), 0 states have call successors, (0), 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 22:20:09,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:09,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:09,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-06 22:20:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-06 22:20:09,748 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:09,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1825701358, now seen corresponding path program 42 times [2023-11-06 22:20:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:09,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013722682] [2023-11-06 22:20:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:09,975 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 22:20:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:09,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013722682] [2023-11-06 22:20:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013722682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:09,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182154222] [2023-11-06 22:20:09,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:20:09,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:09,981 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:10,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-06 22:20:10,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:20:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:10,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:10,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:10,264 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 22:20:10,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:10,510 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 22:20:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182154222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:10,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:10,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2023-11-06 22:20:10,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704809833] [2023-11-06 22:20:10,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:20:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:20:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:20:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:10,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 711 transitions, 14072 flow. Second operand has 16 states, 16 states have (on average 192.0) internal successors, (3072), 16 states have internal predecessors, (3072), 0 states have call successors, (0), 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 22:20:10,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:10,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:10,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:12,415 INFO L124 PetriNetUnfolderBase]: 1508/2581 cut-off events. [2023-11-06 22:20:12,415 INFO L125 PetriNetUnfolderBase]: For 111179/111182 co-relation queries the response was YES. [2023-11-06 22:20:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26548 conditions, 2581 events. 1508/2581 cut-off events. For 111179/111182 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 15283 event pairs, 57 based on Foata normal form. 2/2578 useless extension candidates. Maximal degree in co-relation 26400. Up to 2315 conditions per place. [2023-11-06 22:20:12,466 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 668 selfloop transitions, 79 changer transitions 13/770 dead transitions. [2023-11-06 22:20:12,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 770 transitions, 16360 flow [2023-11-06 22:20:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:20:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:20:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1962 transitions. [2023-11-06 22:20:12,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41656050955414015 [2023-11-06 22:20:12,469 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1962 transitions. [2023-11-06 22:20:12,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1962 transitions. [2023-11-06 22:20:12,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:12,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1962 transitions. [2023-11-06 22:20:12,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 196.2) internal successors, (1962), 10 states have internal predecessors, (1962), 0 states have call successors, (0), 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 22:20:12,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:20:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:20:12,477 INFO L175 Difference]: Start difference. First operand has 377 places, 711 transitions, 14072 flow. Second operand 10 states and 1962 transitions. [2023-11-06 22:20:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 770 transitions, 16360 flow [2023-11-06 22:20:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 770 transitions, 15812 flow, removed 273 selfloop flow, removed 3 redundant places. [2023-11-06 22:20:13,738 INFO L231 Difference]: Finished difference. Result has 387 places, 728 transitions, 14216 flow [2023-11-06 22:20:13,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=13538, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14216, PETRI_PLACES=387, PETRI_TRANSITIONS=728} [2023-11-06 22:20:13,739 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 367 predicate places. [2023-11-06 22:20:13,739 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 728 transitions, 14216 flow [2023-11-06 22:20:13,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 192.0) internal successors, (3072), 16 states have internal predecessors, (3072), 0 states have call successors, (0), 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 22:20:13,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:13,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:13,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-06 22:20:13,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:13,941 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:13,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2035205598, now seen corresponding path program 43 times [2023-11-06 22:20:13,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040570901] [2023-11-06 22:20:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:14,172 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 22:20:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040570901] [2023-11-06 22:20:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040570901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378426945] [2023-11-06 22:20:14,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:20:14,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:14,174 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:14,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-06 22:20:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:14,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:14,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:14,461 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 22:20:14,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:14,701 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 22:20:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378426945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:14,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:20:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915929918] [2023-11-06 22:20:14,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:14,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:20:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:20:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:20:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:15,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 728 transitions, 14216 flow. Second operand has 17 states, 17 states have (on average 191.94117647058823) internal successors, (3263), 17 states have internal predecessors, (3263), 0 states have call successors, (0), 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 22:20:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:16,613 INFO L124 PetriNetUnfolderBase]: 1504/2583 cut-off events. [2023-11-06 22:20:16,614 INFO L125 PetriNetUnfolderBase]: For 102413/102416 co-relation queries the response was YES. [2023-11-06 22:20:16,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26161 conditions, 2583 events. 1504/2583 cut-off events. For 102413/102416 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 15439 event pairs, 55 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 26009. Up to 2226 conditions per place. [2023-11-06 22:20:16,669 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 660 selfloop transitions, 110 changer transitions 19/799 dead transitions. [2023-11-06 22:20:16,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 799 transitions, 16834 flow [2023-11-06 22:20:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:20:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:20:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2355 transitions. [2023-11-06 22:20:16,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-06 22:20:16,672 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2355 transitions. [2023-11-06 22:20:16,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2355 transitions. [2023-11-06 22:20:16,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:16,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2355 transitions. [2023-11-06 22:20:16,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 196.25) internal successors, (2355), 12 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 22:20:16,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:20:16,677 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 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 22:20:16,677 INFO L175 Difference]: Start difference. First operand has 387 places, 728 transitions, 14216 flow. Second operand 12 states and 2355 transitions. [2023-11-06 22:20:16,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 799 transitions, 16834 flow [2023-11-06 22:20:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 799 transitions, 16480 flow, removed 141 selfloop flow, removed 4 redundant places. [2023-11-06 22:20:17,935 INFO L231 Difference]: Finished difference. Result has 396 places, 734 transitions, 14382 flow [2023-11-06 22:20:17,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=13880, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14382, PETRI_PLACES=396, PETRI_TRANSITIONS=734} [2023-11-06 22:20:17,936 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 376 predicate places. [2023-11-06 22:20:17,936 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 734 transitions, 14382 flow [2023-11-06 22:20:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 191.94117647058823) internal successors, (3263), 17 states have internal predecessors, (3263), 0 states have call successors, (0), 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 22:20:17,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:17,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:17,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-06 22:20:18,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:18,137 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:18,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1617132798, now seen corresponding path program 44 times [2023-11-06 22:20:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:18,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877708445] [2023-11-06 22:20:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:18,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:18,368 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 22:20:18,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:18,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877708445] [2023-11-06 22:20:18,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877708445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:18,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841834045] [2023-11-06 22:20:18,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:20:18,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:18,370 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:18,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-06 22:20:18,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:20:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:18,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:18,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:18,648 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 22:20:18,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:18,852 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 22:20:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841834045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:18,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:20:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768349532] [2023-11-06 22:20:18,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:20:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:20:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:20:19,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:19,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 734 transitions, 14382 flow. Second operand has 15 states, 15 states have (on average 192.06666666666666) internal successors, (2881), 15 states have internal predecessors, (2881), 0 states have call successors, (0), 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 22:20:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:19,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:19,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:20,569 INFO L124 PetriNetUnfolderBase]: 1488/2546 cut-off events. [2023-11-06 22:20:20,570 INFO L125 PetriNetUnfolderBase]: For 100899/100902 co-relation queries the response was YES. [2023-11-06 22:20:20,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25629 conditions, 2546 events. 1488/2546 cut-off events. For 100899/100902 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 15054 event pairs, 55 based on Foata normal form. 1/2542 useless extension candidates. Maximal degree in co-relation 25473. Up to 2291 conditions per place. [2023-11-06 22:20:20,639 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 675 selfloop transitions, 91 changer transitions 5/781 dead transitions. [2023-11-06 22:20:20,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 781 transitions, 16496 flow [2023-11-06 22:20:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:20:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:20:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2154 transitions. [2023-11-06 22:20:20,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157498552403011 [2023-11-06 22:20:20,641 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2154 transitions. [2023-11-06 22:20:20,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2154 transitions. [2023-11-06 22:20:20,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:20,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2154 transitions. [2023-11-06 22:20:20,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.8181818181818) internal successors, (2154), 11 states have internal predecessors, (2154), 0 states have call successors, (0), 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 22:20:20,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:20:20,646 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 471.0) internal successors, (5652), 12 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 22:20:20,646 INFO L175 Difference]: Start difference. First operand has 396 places, 734 transitions, 14382 flow. Second operand 11 states and 2154 transitions. [2023-11-06 22:20:20,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 781 transitions, 16496 flow [2023-11-06 22:20:21,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 781 transitions, 16063 flow, removed 140 selfloop flow, removed 6 redundant places. [2023-11-06 22:20:22,015 INFO L231 Difference]: Finished difference. Result has 401 places, 745 transitions, 14541 flow [2023-11-06 22:20:22,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=13963, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14541, PETRI_PLACES=401, PETRI_TRANSITIONS=745} [2023-11-06 22:20:22,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 381 predicate places. [2023-11-06 22:20:22,017 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 745 transitions, 14541 flow [2023-11-06 22:20:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 192.06666666666666) internal successors, (2881), 15 states have internal predecessors, (2881), 0 states have call successors, (0), 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 22:20:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:22,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:22,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-06 22:20:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-06 22:20:22,218 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:22,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1605843366, now seen corresponding path program 45 times [2023-11-06 22:20:22,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:22,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104985923] [2023-11-06 22:20:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:22,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:22,419 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 22:20:22,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:22,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104985923] [2023-11-06 22:20:22,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104985923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:22,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86781519] [2023-11-06 22:20:22,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:20:22,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:22,425 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:22,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-06 22:20:22,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:20:22,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:22,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:22,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:22,671 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 22:20:22,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:22,887 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 22:20:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86781519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:22,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:22,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-06 22:20:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785419048] [2023-11-06 22:20:22,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:20:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:20:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:20:23,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:23,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 745 transitions, 14541 flow. Second operand has 17 states, 17 states have (on average 192.11764705882354) internal successors, (3266), 17 states have internal predecessors, (3266), 0 states have call successors, (0), 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 22:20:23,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:23,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:23,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:24,627 INFO L124 PetriNetUnfolderBase]: 1542/2634 cut-off events. [2023-11-06 22:20:24,627 INFO L125 PetriNetUnfolderBase]: For 104396/104399 co-relation queries the response was YES. [2023-11-06 22:20:24,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26300 conditions, 2634 events. 1542/2634 cut-off events. For 104396/104399 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 15650 event pairs, 60 based on Foata normal form. 1/2630 useless extension candidates. Maximal degree in co-relation 26143. Up to 2340 conditions per place. [2023-11-06 22:20:24,683 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 697 selfloop transitions, 92 changer transitions 7/806 dead transitions. [2023-11-06 22:20:24,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 806 transitions, 16968 flow [2023-11-06 22:20:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:20:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:20:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1579 transitions. [2023-11-06 22:20:24,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190552016985138 [2023-11-06 22:20:24,686 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1579 transitions. [2023-11-06 22:20:24,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1579 transitions. [2023-11-06 22:20:24,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:24,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1579 transitions. [2023-11-06 22:20:24,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.375) internal successors, (1579), 8 states have internal predecessors, (1579), 0 states have call successors, (0), 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 22:20:24,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:24,692 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 471.0) internal successors, (4239), 9 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 22:20:24,692 INFO L175 Difference]: Start difference. First operand has 401 places, 745 transitions, 14541 flow. Second operand 8 states and 1579 transitions. [2023-11-06 22:20:24,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 806 transitions, 16968 flow [2023-11-06 22:20:25,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 806 transitions, 16455 flow, removed 110 selfloop flow, removed 9 redundant places. [2023-11-06 22:20:25,688 INFO L231 Difference]: Finished difference. Result has 401 places, 767 transitions, 14810 flow [2023-11-06 22:20:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=14042, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14810, PETRI_PLACES=401, PETRI_TRANSITIONS=767} [2023-11-06 22:20:25,690 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 381 predicate places. [2023-11-06 22:20:25,690 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 767 transitions, 14810 flow [2023-11-06 22:20:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 192.11764705882354) internal successors, (3266), 17 states have internal predecessors, (3266), 0 states have call successors, (0), 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 22:20:25,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:25,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:25,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-06 22:20:25,897 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:25,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1472389296, now seen corresponding path program 46 times [2023-11-06 22:20:25,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:25,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70003167] [2023-11-06 22:20:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:26,127 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 22:20:26,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:26,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70003167] [2023-11-06 22:20:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70003167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:26,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610490272] [2023-11-06 22:20:26,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:20:26,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:26,129 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:26,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-06 22:20:26,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:20:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:26,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:26,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:26,377 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 22:20:26,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:26,618 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 22:20:26,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610490272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:26,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-11-06 22:20:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585334449] [2023-11-06 22:20:26,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:26,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:20:26,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:20:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:20:26,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:26,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 767 transitions, 14810 flow. Second operand has 18 states, 18 states have (on average 191.88888888888889) internal successors, (3454), 18 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 22:20:26,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:26,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:26,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:28,395 INFO L124 PetriNetUnfolderBase]: 1538/2624 cut-off events. [2023-11-06 22:20:28,395 INFO L125 PetriNetUnfolderBase]: For 102158/102161 co-relation queries the response was YES. [2023-11-06 22:20:28,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25929 conditions, 2624 events. 1538/2624 cut-off events. For 102158/102161 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 15556 event pairs, 59 based on Foata normal form. 1/2620 useless extension candidates. Maximal degree in co-relation 25770. Up to 2341 conditions per place. [2023-11-06 22:20:28,448 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 695 selfloop transitions, 88 changer transitions 9/802 dead transitions. [2023-11-06 22:20:28,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 802 transitions, 16638 flow [2023-11-06 22:20:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:20:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:20:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1769 transitions. [2023-11-06 22:20:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173154045765511 [2023-11-06 22:20:28,451 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1769 transitions. [2023-11-06 22:20:28,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1769 transitions. [2023-11-06 22:20:28,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:28,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1769 transitions. [2023-11-06 22:20:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.55555555555554) internal successors, (1769), 9 states have internal predecessors, (1769), 0 states have call successors, (0), 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 22:20:28,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:20:28,458 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:20:28,458 INFO L175 Difference]: Start difference. First operand has 401 places, 767 transitions, 14810 flow. Second operand 9 states and 1769 transitions. [2023-11-06 22:20:28,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 802 transitions, 16638 flow [2023-11-06 22:20:29,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 802 transitions, 16320 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-11-06 22:20:29,662 INFO L231 Difference]: Finished difference. Result has 405 places, 767 transitions, 14741 flow [2023-11-06 22:20:29,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14741, PETRI_PLACES=405, PETRI_TRANSITIONS=767} [2023-11-06 22:20:29,663 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-11-06 22:20:29,663 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 767 transitions, 14741 flow [2023-11-06 22:20:29,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 191.88888888888889) internal successors, (3454), 18 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 22:20:29,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:29,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:29,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-06 22:20:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-06 22:20:29,865 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:29,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash 350672392, now seen corresponding path program 47 times [2023-11-06 22:20:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645943398] [2023-11-06 22:20:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:29,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:30,094 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 22:20:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645943398] [2023-11-06 22:20:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645943398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950472215] [2023-11-06 22:20:30,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:20:30,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:30,097 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:30,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-06 22:20:30,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:20:30,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:30,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:20:30,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:30,362 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 22:20:30,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:30,634 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 22:20:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950472215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:30,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:30,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 22:20:30,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634493037] [2023-11-06 22:20:30,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:30,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:20:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:20:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:20:30,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 471 [2023-11-06 22:20:31,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 767 transitions, 14741 flow. Second operand has 19 states, 19 states have (on average 191.73684210526315) internal successors, (3643), 19 states have internal predecessors, (3643), 0 states have call successors, (0), 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 22:20:31,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:31,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 471 [2023-11-06 22:20:31,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:32,437 INFO L124 PetriNetUnfolderBase]: 1525/2597 cut-off events. [2023-11-06 22:20:32,437 INFO L125 PetriNetUnfolderBase]: For 98464/98467 co-relation queries the response was YES. [2023-11-06 22:20:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 2597 events. 1525/2597 cut-off events. For 98464/98467 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 15298 event pairs, 59 based on Foata normal form. 1/2593 useless extension candidates. Maximal degree in co-relation 25431. Up to 2221 conditions per place. [2023-11-06 22:20:32,487 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 680 selfloop transitions, 109 changer transitions 5/804 dead transitions. [2023-11-06 22:20:32,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 804 transitions, 16674 flow [2023-11-06 22:20:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:20:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:20:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1964 transitions. [2023-11-06 22:20:32,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169851380042463 [2023-11-06 22:20:32,489 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1964 transitions. [2023-11-06 22:20:32,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1964 transitions. [2023-11-06 22:20:32,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:32,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1964 transitions. [2023-11-06 22:20:32,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 196.4) internal successors, (1964), 10 states have internal predecessors, (1964), 0 states have call successors, (0), 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 22:20:32,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:20:32,493 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 471.0) internal successors, (5181), 11 states have internal predecessors, (5181), 0 states have call successors, (0), 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 22:20:32,493 INFO L175 Difference]: Start difference. First operand has 405 places, 767 transitions, 14741 flow. Second operand 10 states and 1964 transitions. [2023-11-06 22:20:32,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 804 transitions, 16674 flow [2023-11-06 22:20:33,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 804 transitions, 16489 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-11-06 22:20:33,409 INFO L231 Difference]: Finished difference. Result has 408 places, 769 transitions, 14911 flow [2023-11-06 22:20:33,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=14562, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14911, PETRI_PLACES=408, PETRI_TRANSITIONS=769} [2023-11-06 22:20:33,411 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2023-11-06 22:20:33,411 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 769 transitions, 14911 flow [2023-11-06 22:20:33,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 191.73684210526315) internal successors, (3643), 19 states have internal predecessors, (3643), 0 states have call successors, (0), 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 22:20:33,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:33,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:33,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-06 22:20:33,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:33,612 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:33,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash 450349420, now seen corresponding path program 48 times [2023-11-06 22:20:33,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:33,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801069904] [2023-11-06 22:20:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:33,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:33,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801069904] [2023-11-06 22:20:33,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801069904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473472158] [2023-11-06 22:20:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:20:33,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:33,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:33,721 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-06 22:20:33,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:20:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:33,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:33,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:33,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473472158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:33,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:33,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 22:20:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056555190] [2023-11-06 22:20:33,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:20:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:20:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:20:34,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:34,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 769 transitions, 14911 flow. Second operand has 14 states, 14 states have (on average 198.21428571428572) internal successors, (2775), 14 states have internal predecessors, (2775), 0 states have call successors, (0), 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 22:20:34,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:34,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:34,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:35,438 INFO L124 PetriNetUnfolderBase]: 1891/3246 cut-off events. [2023-11-06 22:20:35,438 INFO L125 PetriNetUnfolderBase]: For 119839/119839 co-relation queries the response was YES. [2023-11-06 22:20:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31188 conditions, 3246 events. 1891/3246 cut-off events. For 119839/119839 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19850 event pairs, 346 based on Foata normal form. 4/3250 useless extension candidates. Maximal degree in co-relation 31028. Up to 1942 conditions per place. [2023-11-06 22:20:35,505 INFO L140 encePairwiseOnDemand]: 466/471 looper letters, 723 selfloop transitions, 242 changer transitions 15/980 dead transitions. [2023-11-06 22:20:35,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 980 transitions, 20591 flow [2023-11-06 22:20:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:20:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:20:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1823 transitions. [2023-11-06 22:20:35,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300542580797358 [2023-11-06 22:20:35,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1823 transitions. [2023-11-06 22:20:35,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1823 transitions. [2023-11-06 22:20:35,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:35,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1823 transitions. [2023-11-06 22:20:35,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.55555555555554) internal successors, (1823), 9 states have internal predecessors, (1823), 0 states have call successors, (0), 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 22:20:35,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:20:35,512 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 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 22:20:35,512 INFO L175 Difference]: Start difference. First operand has 408 places, 769 transitions, 14911 flow. Second operand 9 states and 1823 transitions. [2023-11-06 22:20:35,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 980 transitions, 20591 flow [2023-11-06 22:20:36,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 980 transitions, 20147 flow, removed 94 selfloop flow, removed 7 redundant places. [2023-11-06 22:20:36,839 INFO L231 Difference]: Finished difference. Result has 413 places, 855 transitions, 17135 flow [2023-11-06 22:20:36,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=14626, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17135, PETRI_PLACES=413, PETRI_TRANSITIONS=855} [2023-11-06 22:20:36,841 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-11-06 22:20:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 855 transitions, 17135 flow [2023-11-06 22:20:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 198.21428571428572) internal successors, (2775), 14 states have internal predecessors, (2775), 0 states have call successors, (0), 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 22:20:36,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:36,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:36,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:37,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-06 22:20:37,048 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:37,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -928185903, now seen corresponding path program 49 times [2023-11-06 22:20:37,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:37,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928990067] [2023-11-06 22:20:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:37,127 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 22:20:37,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928990067] [2023-11-06 22:20:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928990067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961388220] [2023-11-06 22:20:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:20:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:37,128 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-06 22:20:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:37,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:37,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:37,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961388220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:37,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 22:20:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215437743] [2023-11-06 22:20:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:37,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:20:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:20:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:20:37,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:37,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 855 transitions, 17135 flow. Second operand has 14 states, 14 states have (on average 197.92857142857142) internal successors, (2771), 14 states have internal predecessors, (2771), 0 states have call successors, (0), 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 22:20:37,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:37,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:39,172 INFO L124 PetriNetUnfolderBase]: 2054/3517 cut-off events. [2023-11-06 22:20:39,172 INFO L125 PetriNetUnfolderBase]: For 139885/139885 co-relation queries the response was YES. [2023-11-06 22:20:39,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34639 conditions, 3517 events. 2054/3517 cut-off events. For 139885/139885 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 21696 event pairs, 125 based on Foata normal form. 14/3531 useless extension candidates. Maximal degree in co-relation 34475. Up to 1038 conditions per place. [2023-11-06 22:20:39,252 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 642 selfloop transitions, 421 changer transitions 0/1063 dead transitions. [2023-11-06 22:20:39,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1063 transitions, 22859 flow [2023-11-06 22:20:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:20:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:20:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2627 transitions. [2023-11-06 22:20:39,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290380532418749 [2023-11-06 22:20:39,255 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2627 transitions. [2023-11-06 22:20:39,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2627 transitions. [2023-11-06 22:20:39,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:39,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2627 transitions. [2023-11-06 22:20:39,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 202.07692307692307) internal successors, (2627), 13 states have internal predecessors, (2627), 0 states have call successors, (0), 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 22:20:39,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:20:39,261 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 471.0) internal successors, (6594), 14 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 22:20:39,261 INFO L175 Difference]: Start difference. First operand has 413 places, 855 transitions, 17135 flow. Second operand 13 states and 2627 transitions. [2023-11-06 22:20:39,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1063 transitions, 22859 flow [2023-11-06 22:20:40,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1063 transitions, 22488 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-11-06 22:20:40,713 INFO L231 Difference]: Finished difference. Result has 422 places, 922 transitions, 19366 flow [2023-11-06 22:20:40,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=16766, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19366, PETRI_PLACES=422, PETRI_TRANSITIONS=922} [2023-11-06 22:20:40,715 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 402 predicate places. [2023-11-06 22:20:40,715 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 922 transitions, 19366 flow [2023-11-06 22:20:40,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 197.92857142857142) internal successors, (2771), 14 states have internal predecessors, (2771), 0 states have call successors, (0), 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 22:20:40,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:40,715 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:40,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-06 22:20:40,916 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:40,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -139655249, now seen corresponding path program 50 times [2023-11-06 22:20:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:40,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509081220] [2023-11-06 22:20:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509081220] [2023-11-06 22:20:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509081220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14617179] [2023-11-06 22:20:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:20:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:41,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:41,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-06 22:20:41,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:20:41,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:41,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:41,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:41,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14617179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:41,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:41,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:20:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165457772] [2023-11-06 22:20:41,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:41,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:20:41,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:20:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:20:41,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:41,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 922 transitions, 19366 flow. Second operand has 16 states, 16 states have (on average 197.75) internal successors, (3164), 16 states have internal predecessors, (3164), 0 states have call successors, (0), 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 22:20:41,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:41,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:41,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:43,891 INFO L124 PetriNetUnfolderBase]: 2160/3699 cut-off events. [2023-11-06 22:20:43,891 INFO L125 PetriNetUnfolderBase]: For 157759/157759 co-relation queries the response was YES. [2023-11-06 22:20:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37816 conditions, 3699 events. 2160/3699 cut-off events. For 157759/157759 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23107 event pairs, 223 based on Foata normal form. 18/3717 useless extension candidates. Maximal degree in co-relation 37649. Up to 1518 conditions per place. [2023-11-06 22:20:43,970 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 640 selfloop transitions, 377 changer transitions 0/1017 dead transitions. [2023-11-06 22:20:43,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1017 transitions, 23034 flow [2023-11-06 22:20:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:20:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:20:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3819 transitions. [2023-11-06 22:20:43,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267515923566879 [2023-11-06 22:20:43,975 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3819 transitions. [2023-11-06 22:20:43,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3819 transitions. [2023-11-06 22:20:43,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:43,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3819 transitions. [2023-11-06 22:20:43,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 201.0) internal successors, (3819), 19 states have internal predecessors, (3819), 0 states have call successors, (0), 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 22:20:43,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:20:43,985 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:20:43,985 INFO L175 Difference]: Start difference. First operand has 422 places, 922 transitions, 19366 flow. Second operand 19 states and 3819 transitions. [2023-11-06 22:20:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1017 transitions, 23034 flow [2023-11-06 22:20:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1017 transitions, 22474 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-11-06 22:20:45,596 INFO L231 Difference]: Finished difference. Result has 444 places, 965 transitions, 20707 flow [2023-11-06 22:20:45,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=18840, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20707, PETRI_PLACES=444, PETRI_TRANSITIONS=965} [2023-11-06 22:20:45,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 424 predicate places. [2023-11-06 22:20:45,598 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 965 transitions, 20707 flow [2023-11-06 22:20:45,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 197.75) internal successors, (3164), 16 states have internal predecessors, (3164), 0 states have call successors, (0), 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 22:20:45,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:45,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:45,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:45,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-06 22:20:45,804 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:45,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1917751931, now seen corresponding path program 51 times [2023-11-06 22:20:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149157392] [2023-11-06 22:20:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:45,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:45,917 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 22:20:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149157392] [2023-11-06 22:20:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149157392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330733102] [2023-11-06 22:20:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:20:45,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:45,925 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:45,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-06 22:20:46,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:20:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:46,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:46,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:46,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:46,230 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 22:20:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330733102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:46,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:46,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:20:46,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821014572] [2023-11-06 22:20:46,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:46,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:20:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:20:46,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:20:46,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:46,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 965 transitions, 20707 flow. Second operand has 15 states, 15 states have (on average 197.93333333333334) internal successors, (2969), 15 states have internal predecessors, (2969), 0 states have call successors, (0), 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 22:20:46,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:46,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:48,808 INFO L124 PetriNetUnfolderBase]: 2304/3933 cut-off events. [2023-11-06 22:20:48,808 INFO L125 PetriNetUnfolderBase]: For 185435/185435 co-relation queries the response was YES. [2023-11-06 22:20:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42244 conditions, 3933 events. 2304/3933 cut-off events. For 185435/185435 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 24775 event pairs, 183 based on Foata normal form. 22/3955 useless extension candidates. Maximal degree in co-relation 42069. Up to 1383 conditions per place. [2023-11-06 22:20:48,915 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 534 selfloop transitions, 547 changer transitions 0/1081 dead transitions. [2023-11-06 22:20:48,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1081 transitions, 25944 flow [2023-11-06 22:20:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:20:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:20:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4820 transitions. [2023-11-06 22:20:48,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42639773531493275 [2023-11-06 22:20:48,920 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4820 transitions. [2023-11-06 22:20:48,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4820 transitions. [2023-11-06 22:20:48,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:48,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4820 transitions. [2023-11-06 22:20:48,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 200.83333333333334) internal successors, (4820), 24 states have internal predecessors, (4820), 0 states have call successors, (0), 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 22:20:48,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 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 22:20:48,936 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 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 22:20:48,936 INFO L175 Difference]: Start difference. First operand has 444 places, 965 transitions, 20707 flow. Second operand 24 states and 4820 transitions. [2023-11-06 22:20:48,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1081 transitions, 25944 flow [2023-11-06 22:20:50,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1081 transitions, 25367 flow, removed 208 selfloop flow, removed 4 redundant places. [2023-11-06 22:20:50,798 INFO L231 Difference]: Finished difference. Result has 471 places, 1038 transitions, 24328 flow [2023-11-06 22:20:50,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=20318, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24328, PETRI_PLACES=471, PETRI_TRANSITIONS=1038} [2023-11-06 22:20:50,800 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 451 predicate places. [2023-11-06 22:20:50,800 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1038 transitions, 24328 flow [2023-11-06 22:20:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.93333333333334) internal successors, (2969), 15 states have internal predecessors, (2969), 0 states have call successors, (0), 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 22:20:50,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:50,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:50,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-06 22:20:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:51,002 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:51,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 703033381, now seen corresponding path program 52 times [2023-11-06 22:20:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:51,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536212586] [2023-11-06 22:20:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:51,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:51,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536212586] [2023-11-06 22:20:51,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536212586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:51,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758417848] [2023-11-06 22:20:51,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:20:51,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:51,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:51,103 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:51,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-06 22:20:51,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:20:51,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:51,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:51,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:51,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758417848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:51,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:51,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:20:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777756447] [2023-11-06 22:20:51,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:51,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:20:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:20:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:20:51,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:51,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1038 transitions, 24328 flow. Second operand has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:20:51,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:51,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:51,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:53,605 INFO L124 PetriNetUnfolderBase]: 2302/3939 cut-off events. [2023-11-06 22:20:53,605 INFO L125 PetriNetUnfolderBase]: For 204065/204065 co-relation queries the response was YES. [2023-11-06 22:20:53,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44230 conditions, 3939 events. 2302/3939 cut-off events. For 204065/204065 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25041 event pairs, 286 based on Foata normal form. 8/3947 useless extension candidates. Maximal degree in co-relation 44047. Up to 1758 conditions per place. [2023-11-06 22:20:53,717 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 595 selfloop transitions, 474 changer transitions 4/1073 dead transitions. [2023-11-06 22:20:53,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1073 transitions, 27052 flow [2023-11-06 22:20:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:20:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:20:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3812 transitions. [2023-11-06 22:20:53,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596938205386076 [2023-11-06 22:20:53,721 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3812 transitions. [2023-11-06 22:20:53,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3812 transitions. [2023-11-06 22:20:53,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:53,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3812 transitions. [2023-11-06 22:20:53,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 200.6315789473684) internal successors, (3812), 19 states have internal predecessors, (3812), 0 states have call successors, (0), 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 22:20:53,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:20:53,730 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:20:53,730 INFO L175 Difference]: Start difference. First operand has 471 places, 1038 transitions, 24328 flow. Second operand 19 states and 3812 transitions. [2023-11-06 22:20:53,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1073 transitions, 27052 flow [2023-11-06 22:20:56,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1073 transitions, 25185 flow, removed 679 selfloop flow, removed 14 redundant places. [2023-11-06 22:20:56,112 INFO L231 Difference]: Finished difference. Result has 477 places, 1036 transitions, 23429 flow [2023-11-06 22:20:56,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=22462, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23429, PETRI_PLACES=477, PETRI_TRANSITIONS=1036} [2023-11-06 22:20:56,114 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-11-06 22:20:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1036 transitions, 23429 flow [2023-11-06 22:20:56,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:20:56,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:56,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:56,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:56,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:56,321 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:56,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 571897354, now seen corresponding path program 53 times [2023-11-06 22:20:56,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:56,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658015653] [2023-11-06 22:20:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:56,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:56,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658015653] [2023-11-06 22:20:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658015653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335461616] [2023-11-06 22:20:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:20:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:56,407 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-06 22:20:56,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:20:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:56,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:20:56,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:56,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335461616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:56,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:20:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874336620] [2023-11-06 22:20:56,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:20:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:20:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:20:56,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:20:56,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1036 transitions, 23429 flow. Second operand has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 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 22:20:56,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:56,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:20:56,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:59,036 INFO L124 PetriNetUnfolderBase]: 2326/3991 cut-off events. [2023-11-06 22:20:59,036 INFO L125 PetriNetUnfolderBase]: For 208802/208802 co-relation queries the response was YES. [2023-11-06 22:20:59,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43860 conditions, 3991 events. 2326/3991 cut-off events. For 208802/208802 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25391 event pairs, 468 based on Foata normal form. 16/4007 useless extension candidates. Maximal degree in co-relation 43679. Up to 2906 conditions per place. [2023-11-06 22:20:59,147 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 848 selfloop transitions, 297 changer transitions 12/1157 dead transitions. [2023-11-06 22:20:59,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1157 transitions, 27958 flow [2023-11-06 22:20:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:20:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:20:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3019 transitions. [2023-11-06 22:20:59,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273177636234961 [2023-11-06 22:20:59,150 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3019 transitions. [2023-11-06 22:20:59,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3019 transitions. [2023-11-06 22:20:59,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:59,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3019 transitions. [2023-11-06 22:20:59,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 201.26666666666668) internal successors, (3019), 15 states have internal predecessors, (3019), 0 states have call successors, (0), 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 22:20:59,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 471.0) internal successors, (7536), 16 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 22:20:59,157 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 471.0) internal successors, (7536), 16 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 22:20:59,157 INFO L175 Difference]: Start difference. First operand has 477 places, 1036 transitions, 23429 flow. Second operand 15 states and 3019 transitions. [2023-11-06 22:20:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1157 transitions, 27958 flow [2023-11-06 22:21:01,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1157 transitions, 26940 flow, removed 41 selfloop flow, removed 15 redundant places. [2023-11-06 22:21:01,332 INFO L231 Difference]: Finished difference. Result has 479 places, 1060 transitions, 23845 flow [2023-11-06 22:21:01,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=22417, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23845, PETRI_PLACES=479, PETRI_TRANSITIONS=1060} [2023-11-06 22:21:01,333 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 459 predicate places. [2023-11-06 22:21:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1060 transitions, 23845 flow [2023-11-06 22:21:01,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 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 22:21:01,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:01,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:01,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:01,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-06 22:21:01,540 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:01,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1990021145, now seen corresponding path program 54 times [2023-11-06 22:21:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:01,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946149186] [2023-11-06 22:21:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:01,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:01,634 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 22:21:01,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946149186] [2023-11-06 22:21:01,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946149186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297928749] [2023-11-06 22:21:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:21:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:01,641 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:01,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-06 22:21:01,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:21:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:01,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:01,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:01,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:01,908 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 22:21:01,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297928749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:01,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:01,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:21:01,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072131467] [2023-11-06 22:21:01,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:01,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:01,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:01,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:01,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1060 transitions, 23845 flow. Second operand has 15 states, 15 states have (on average 198.06666666666666) internal successors, (2971), 15 states have internal predecessors, (2971), 0 states have call successors, (0), 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 22:21:01,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:01,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:04,790 INFO L124 PetriNetUnfolderBase]: 2398/4115 cut-off events. [2023-11-06 22:21:04,790 INFO L125 PetriNetUnfolderBase]: For 213560/213560 co-relation queries the response was YES. [2023-11-06 22:21:04,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44960 conditions, 4115 events. 2398/4115 cut-off events. For 213560/213560 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26346 event pairs, 217 based on Foata normal form. 14/4129 useless extension candidates. Maximal degree in co-relation 44777. Up to 1517 conditions per place. [2023-11-06 22:21:04,877 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 659 selfloop transitions, 485 changer transitions 0/1144 dead transitions. [2023-11-06 22:21:04,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1144 transitions, 27515 flow [2023-11-06 22:21:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:21:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:21:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4217 transitions. [2023-11-06 22:21:04,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42634718430896773 [2023-11-06 22:21:04,881 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4217 transitions. [2023-11-06 22:21:04,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4217 transitions. [2023-11-06 22:21:04,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:04,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4217 transitions. [2023-11-06 22:21:04,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 200.8095238095238) internal successors, (4217), 21 states have internal predecessors, (4217), 0 states have call successors, (0), 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 22:21:04,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 471.0) internal successors, (10362), 22 states have internal predecessors, (10362), 0 states have call successors, (0), 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 22:21:04,888 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 471.0) internal successors, (10362), 22 states have internal predecessors, (10362), 0 states have call successors, (0), 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 22:21:04,888 INFO L175 Difference]: Start difference. First operand has 479 places, 1060 transitions, 23845 flow. Second operand 21 states and 4217 transitions. [2023-11-06 22:21:04,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1144 transitions, 27515 flow [2023-11-06 22:21:07,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1144 transitions, 26483 flow, removed 176 selfloop flow, removed 11 redundant places. [2023-11-06 22:21:07,540 INFO L231 Difference]: Finished difference. Result has 492 places, 1099 transitions, 24917 flow [2023-11-06 22:21:07,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=22823, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24917, PETRI_PLACES=492, PETRI_TRANSITIONS=1099} [2023-11-06 22:21:07,542 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 472 predicate places. [2023-11-06 22:21:07,542 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1099 transitions, 24917 flow [2023-11-06 22:21:07,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 198.06666666666666) internal successors, (2971), 15 states have internal predecessors, (2971), 0 states have call successors, (0), 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 22:21:07,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:07,543 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:07,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:07,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-06 22:21:07,749 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:07,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1130043466, now seen corresponding path program 55 times [2023-11-06 22:21:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813180353] [2023-11-06 22:21:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813180353] [2023-11-06 22:21:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813180353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840141620] [2023-11-06 22:21:07,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:21:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:07,834 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:07,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-06 22:21:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:07,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:07,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:08,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:08,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840141620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:08,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:08,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:21:08,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319808117] [2023-11-06 22:21:08,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:08,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:08,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1099 transitions, 24917 flow. Second operand has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 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 22:21:08,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:08,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:08,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:10,667 INFO L124 PetriNetUnfolderBase]: 2599/4390 cut-off events. [2023-11-06 22:21:10,668 INFO L125 PetriNetUnfolderBase]: For 235949/235949 co-relation queries the response was YES. [2023-11-06 22:21:10,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 4390 events. 2599/4390 cut-off events. For 235949/235949 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 27896 event pairs, 492 based on Foata normal form. 36/4426 useless extension candidates. Maximal degree in co-relation 49429. Up to 3096 conditions per place. [2023-11-06 22:21:10,762 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 822 selfloop transitions, 479 changer transitions 8/1309 dead transitions. [2023-11-06 22:21:10,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1309 transitions, 32235 flow [2023-11-06 22:21:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:21:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:21:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3818 transitions. [2023-11-06 22:21:10,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266398480277126 [2023-11-06 22:21:10,766 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3818 transitions. [2023-11-06 22:21:10,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3818 transitions. [2023-11-06 22:21:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:10,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3818 transitions. [2023-11-06 22:21:10,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 200.94736842105263) internal successors, (3818), 19 states have internal predecessors, (3818), 0 states have call successors, (0), 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 22:21:10,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:21:10,773 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 471.0) internal successors, (9420), 20 states have internal predecessors, (9420), 0 states have call successors, (0), 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 22:21:10,773 INFO L175 Difference]: Start difference. First operand has 492 places, 1099 transitions, 24917 flow. Second operand 19 states and 3818 transitions. [2023-11-06 22:21:10,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1309 transitions, 32235 flow [2023-11-06 22:21:13,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1309 transitions, 31840 flow, removed 80 selfloop flow, removed 10 redundant places. [2023-11-06 22:21:13,270 INFO L231 Difference]: Finished difference. Result has 504 places, 1211 transitions, 29083 flow [2023-11-06 22:21:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=24366, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=29083, PETRI_PLACES=504, PETRI_TRANSITIONS=1211} [2023-11-06 22:21:13,272 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 484 predicate places. [2023-11-06 22:21:13,272 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1211 transitions, 29083 flow [2023-11-06 22:21:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 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 22:21:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:13,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:13,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-06 22:21:13,473 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:13,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1271634520, now seen corresponding path program 56 times [2023-11-06 22:21:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194576699] [2023-11-06 22:21:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:13,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:13,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:13,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194576699] [2023-11-06 22:21:13,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194576699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:13,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507843125] [2023-11-06 22:21:13,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:13,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:13,561 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-06 22:21:13,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:13,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:13,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:13,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:13,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507843125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:13,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:21:13,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252602294] [2023-11-06 22:21:13,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:13,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:13,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1211 transitions, 29083 flow. Second operand has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:21:13,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:13,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:13,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:16,571 INFO L124 PetriNetUnfolderBase]: 2573/4328 cut-off events. [2023-11-06 22:21:16,571 INFO L125 PetriNetUnfolderBase]: For 248410/248410 co-relation queries the response was YES. [2023-11-06 22:21:16,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50681 conditions, 4328 events. 2573/4328 cut-off events. For 248410/248410 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27290 event pairs, 495 based on Foata normal form. 24/4352 useless extension candidates. Maximal degree in co-relation 50489. Up to 3099 conditions per place. [2023-11-06 22:21:16,732 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 801 selfloop transitions, 501 changer transitions 1/1303 dead transitions. [2023-11-06 22:21:16,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1303 transitions, 33208 flow [2023-11-06 22:21:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:21:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:21:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5607 transitions. [2023-11-06 22:21:16,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251592356687898 [2023-11-06 22:21:16,737 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5607 transitions. [2023-11-06 22:21:16,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5607 transitions. [2023-11-06 22:21:16,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:16,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5607 transitions. [2023-11-06 22:21:16,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 200.25) internal successors, (5607), 28 states have internal predecessors, (5607), 0 states have call successors, (0), 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 22:21:16,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 471.0) internal successors, (13659), 29 states have internal predecessors, (13659), 0 states have call successors, (0), 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 22:21:16,748 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 471.0) internal successors, (13659), 29 states have internal predecessors, (13659), 0 states have call successors, (0), 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 22:21:16,748 INFO L175 Difference]: Start difference. First operand has 504 places, 1211 transitions, 29083 flow. Second operand 28 states and 5607 transitions. [2023-11-06 22:21:16,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1303 transitions, 33208 flow [2023-11-06 22:21:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1303 transitions, 31602 flow, removed 567 selfloop flow, removed 13 redundant places. [2023-11-06 22:21:19,763 INFO L231 Difference]: Finished difference. Result has 521 places, 1218 transitions, 28862 flow [2023-11-06 22:21:19,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=27273, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28862, PETRI_PLACES=521, PETRI_TRANSITIONS=1218} [2023-11-06 22:21:19,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 501 predicate places. [2023-11-06 22:21:19,765 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1218 transitions, 28862 flow [2023-11-06 22:21:19,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.8) internal successors, (2967), 15 states have internal predecessors, (2967), 0 states have call successors, (0), 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 22:21:19,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:19,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:19,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-06 22:21:19,968 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:19,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1343794502, now seen corresponding path program 57 times [2023-11-06 22:21:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093734211] [2023-11-06 22:21:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093734211] [2023-11-06 22:21:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093734211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687766313] [2023-11-06 22:21:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:21:20,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:20,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:20,062 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:20,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-06 22:21:20,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:21:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:20,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:20,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:20,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687766313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:20,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:20,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:21:20,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629169922] [2023-11-06 22:21:20,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:20,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:20,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:20,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1218 transitions, 28862 flow. Second operand has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 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 22:21:20,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:20,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:20,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:23,144 INFO L124 PetriNetUnfolderBase]: 2667/4466 cut-off events. [2023-11-06 22:21:23,145 INFO L125 PetriNetUnfolderBase]: For 242073/242073 co-relation queries the response was YES. [2023-11-06 22:21:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52042 conditions, 4466 events. 2667/4466 cut-off events. For 242073/242073 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28092 event pairs, 499 based on Foata normal form. 20/4486 useless extension candidates. Maximal degree in co-relation 51847. Up to 3195 conditions per place. [2023-11-06 22:21:23,442 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 921 selfloop transitions, 408 changer transitions 21/1350 dead transitions. [2023-11-06 22:21:23,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1350 transitions, 34377 flow [2023-11-06 22:21:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:21:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:21:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3419 transitions. [2023-11-06 22:21:23,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270013737979268 [2023-11-06 22:21:23,445 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3419 transitions. [2023-11-06 22:21:23,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3419 transitions. [2023-11-06 22:21:23,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:23,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3419 transitions. [2023-11-06 22:21:23,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 201.11764705882354) internal successors, (3419), 17 states have internal predecessors, (3419), 0 states have call successors, (0), 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 22:21:23,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:21:23,452 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 471.0) internal successors, (8478), 18 states have internal predecessors, (8478), 0 states have call successors, (0), 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 22:21:23,452 INFO L175 Difference]: Start difference. First operand has 521 places, 1218 transitions, 28862 flow. Second operand 17 states and 3419 transitions. [2023-11-06 22:21:23,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1350 transitions, 34377 flow [2023-11-06 22:21:26,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1350 transitions, 33419 flow, removed 207 selfloop flow, removed 14 redundant places. [2023-11-06 22:21:26,298 INFO L231 Difference]: Finished difference. Result has 526 places, 1246 transitions, 30051 flow [2023-11-06 22:21:26,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=27974, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=30051, PETRI_PLACES=526, PETRI_TRANSITIONS=1246} [2023-11-06 22:21:26,302 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 506 predicate places. [2023-11-06 22:21:26,303 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 1246 transitions, 30051 flow [2023-11-06 22:21:26,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 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 22:21:26,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:26,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:26,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:26,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:26,510 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:26,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1113348671, now seen corresponding path program 58 times [2023-11-06 22:21:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479226391] [2023-11-06 22:21:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:26,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479226391] [2023-11-06 22:21:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479226391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053543154] [2023-11-06 22:21:26,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:21:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:26,637 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-06 22:21:26,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:21:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:26,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:26,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:26,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:26,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053543154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:26,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:26,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-06 22:21:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482289089] [2023-11-06 22:21:26,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:26,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:26,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 1246 transitions, 30051 flow. Second operand has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:21:26,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:26,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:26,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:30,223 INFO L124 PetriNetUnfolderBase]: 2992/4971 cut-off events. [2023-11-06 22:21:30,223 INFO L125 PetriNetUnfolderBase]: For 287443/287443 co-relation queries the response was YES. [2023-11-06 22:21:30,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59043 conditions, 4971 events. 2992/4971 cut-off events. For 287443/287443 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31391 event pairs, 170 based on Foata normal form. 64/5035 useless extension candidates. Maximal degree in co-relation 58845. Up to 1525 conditions per place. [2023-11-06 22:21:30,339 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 623 selfloop transitions, 839 changer transitions 1/1463 dead transitions. [2023-11-06 22:21:30,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 1463 transitions, 38656 flow [2023-11-06 22:21:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:21:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:21:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5017 transitions. [2023-11-06 22:21:30,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42607218683651804 [2023-11-06 22:21:30,343 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5017 transitions. [2023-11-06 22:21:30,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5017 transitions. [2023-11-06 22:21:30,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:30,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5017 transitions. [2023-11-06 22:21:30,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 200.68) internal successors, (5017), 25 states have internal predecessors, (5017), 0 states have call successors, (0), 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 22:21:30,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 471.0) internal successors, (12246), 26 states have internal predecessors, (12246), 0 states have call successors, (0), 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 22:21:30,354 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 471.0) internal successors, (12246), 26 states have internal predecessors, (12246), 0 states have call successors, (0), 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 22:21:30,354 INFO L175 Difference]: Start difference. First operand has 526 places, 1246 transitions, 30051 flow. Second operand 25 states and 5017 transitions. [2023-11-06 22:21:30,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 1463 transitions, 38656 flow [2023-11-06 22:21:33,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1463 transitions, 37799 flow, removed 161 selfloop flow, removed 12 redundant places. [2023-11-06 22:21:33,062 INFO L231 Difference]: Finished difference. Result has 540 places, 1412 transitions, 36730 flow [2023-11-06 22:21:33,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=29120, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=36730, PETRI_PLACES=540, PETRI_TRANSITIONS=1412} [2023-11-06 22:21:33,063 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-11-06 22:21:33,064 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1412 transitions, 36730 flow [2023-11-06 22:21:33,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:21:33,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:33,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:33,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-06 22:21:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:33,265 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:33,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1900950495, now seen corresponding path program 59 times [2023-11-06 22:21:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892619968] [2023-11-06 22:21:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:33,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892619968] [2023-11-06 22:21:33,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892619968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732482579] [2023-11-06 22:21:33,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:21:33,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:33,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:33,332 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:33,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-06 22:21:33,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:21:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:33,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:33,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:33,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:21:33,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732482579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:33,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:33,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-06 22:21:33,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416986830] [2023-11-06 22:21:33,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:33,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:33,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:33,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1412 transitions, 36730 flow. Second operand has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:21:33,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:33,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:37,001 INFO L124 PetriNetUnfolderBase]: 2983/4962 cut-off events. [2023-11-06 22:21:37,001 INFO L125 PetriNetUnfolderBase]: For 288819/288819 co-relation queries the response was YES. [2023-11-06 22:21:37,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61496 conditions, 4962 events. 2983/4962 cut-off events. For 288819/288819 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 31562 event pairs, 311 based on Foata normal form. 12/4974 useless extension candidates. Maximal degree in co-relation 61293. Up to 2105 conditions per place. [2023-11-06 22:21:37,127 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 717 selfloop transitions, 727 changer transitions 7/1451 dead transitions. [2023-11-06 22:21:37,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1451 transitions, 40521 flow [2023-11-06 22:21:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:21:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:21:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4010 transitions. [2023-11-06 22:21:37,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256900212314225 [2023-11-06 22:21:37,130 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4010 transitions. [2023-11-06 22:21:37,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4010 transitions. [2023-11-06 22:21:37,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:37,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4010 transitions. [2023-11-06 22:21:37,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 200.5) internal successors, (4010), 20 states have internal predecessors, (4010), 0 states have call successors, (0), 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 22:21:37,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 471.0) internal successors, (9891), 21 states have internal predecessors, (9891), 0 states have call successors, (0), 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 22:21:37,138 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 471.0) internal successors, (9891), 21 states have internal predecessors, (9891), 0 states have call successors, (0), 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 22:21:37,138 INFO L175 Difference]: Start difference. First operand has 540 places, 1412 transitions, 36730 flow. Second operand 20 states and 4010 transitions. [2023-11-06 22:21:37,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1451 transitions, 40521 flow [2023-11-06 22:21:41,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 1451 transitions, 39321 flow, removed 492 selfloop flow, removed 15 redundant places. [2023-11-06 22:21:41,536 INFO L231 Difference]: Finished difference. Result has 544 places, 1404 transitions, 36913 flow [2023-11-06 22:21:41,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=35468, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=36913, PETRI_PLACES=544, PETRI_TRANSITIONS=1404} [2023-11-06 22:21:41,537 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 524 predicate places. [2023-11-06 22:21:41,537 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1404 transitions, 36913 flow [2023-11-06 22:21:41,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 197.86666666666667) internal successors, (2968), 15 states have internal predecessors, (2968), 0 states have call successors, (0), 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 22:21:41,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:41,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:41,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-06 22:21:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,739 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:41,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 315044497, now seen corresponding path program 60 times [2023-11-06 22:21:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668665865] [2023-11-06 22:21:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:41,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:41,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668665865] [2023-11-06 22:21:41,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668665865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:41,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223462852] [2023-11-06 22:21:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:21:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:41,831 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:41,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-06 22:21:41,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:21:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:41,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:41,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:42,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:42,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223462852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:42,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:21:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340813317] [2023-11-06 22:21:42,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:21:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:21:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:21:42,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:42,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1404 transitions, 36913 flow. Second operand has 16 states, 16 states have (on average 197.75) internal successors, (3164), 16 states have internal predecessors, (3164), 0 states have call successors, (0), 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 22:21:42,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:42,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:42,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:46,043 INFO L124 PetriNetUnfolderBase]: 3040/5049 cut-off events. [2023-11-06 22:21:46,043 INFO L125 PetriNetUnfolderBase]: For 294672/294672 co-relation queries the response was YES. [2023-11-06 22:21:46,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62974 conditions, 5049 events. 3040/5049 cut-off events. For 294672/294672 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 32160 event pairs, 313 based on Foata normal form. 6/5055 useless extension candidates. Maximal degree in co-relation 62773. Up to 2129 conditions per place. [2023-11-06 22:21:46,161 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 729 selfloop transitions, 745 changer transitions 9/1483 dead transitions. [2023-11-06 22:21:46,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1483 transitions, 42012 flow [2023-11-06 22:21:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:21:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:21:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4007 transitions. [2023-11-06 22:21:46,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253715498938429 [2023-11-06 22:21:46,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4007 transitions. [2023-11-06 22:21:46,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4007 transitions. [2023-11-06 22:21:46,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:46,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4007 transitions. [2023-11-06 22:21:46,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 200.35) internal successors, (4007), 20 states have internal predecessors, (4007), 0 states have call successors, (0), 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 22:21:46,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 471.0) internal successors, (9891), 21 states have internal predecessors, (9891), 0 states have call successors, (0), 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 22:21:46,174 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 471.0) internal successors, (9891), 21 states have internal predecessors, (9891), 0 states have call successors, (0), 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 22:21:46,174 INFO L175 Difference]: Start difference. First operand has 544 places, 1404 transitions, 36913 flow. Second operand 20 states and 4007 transitions. [2023-11-06 22:21:46,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1483 transitions, 42012 flow [2023-11-06 22:21:49,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1483 transitions, 40785 flow, removed 74 selfloop flow, removed 15 redundant places. [2023-11-06 22:21:49,678 INFO L231 Difference]: Finished difference. Result has 553 places, 1437 transitions, 39040 flow [2023-11-06 22:21:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=35792, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=39040, PETRI_PLACES=553, PETRI_TRANSITIONS=1437} [2023-11-06 22:21:49,680 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 533 predicate places. [2023-11-06 22:21:49,680 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1437 transitions, 39040 flow [2023-11-06 22:21:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 197.75) internal successors, (3164), 16 states have internal predecessors, (3164), 0 states have call successors, (0), 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 22:21:49,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:49,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:49,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-06 22:21:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:49,881 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:49,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash 364426449, now seen corresponding path program 61 times [2023-11-06 22:21:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996392096] [2023-11-06 22:21:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:49,975 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 22:21:49,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996392096] [2023-11-06 22:21:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996392096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645033700] [2023-11-06 22:21:49,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:21:49,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:49,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:49,978 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:50,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-06 22:21:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:50,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:50,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:50,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:50,268 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 22:21:50,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645033700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:50,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:50,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-06 22:21:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131841] [2023-11-06 22:21:50,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:50,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:21:50,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:21:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:21:50,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:50,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1437 transitions, 39040 flow. Second operand has 15 states, 15 states have (on average 198.13333333333333) internal successors, (2972), 15 states have internal predecessors, (2972), 0 states have call successors, (0), 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 22:21:50,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:50,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:54,611 INFO L124 PetriNetUnfolderBase]: 3175/5294 cut-off events. [2023-11-06 22:21:54,611 INFO L125 PetriNetUnfolderBase]: For 335880/335880 co-relation queries the response was YES. [2023-11-06 22:21:54,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67009 conditions, 5294 events. 3175/5294 cut-off events. For 335880/335880 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34050 event pairs, 152 based on Foata normal form. 28/5322 useless extension candidates. Maximal degree in co-relation 66803. Up to 2104 conditions per place. [2023-11-06 22:21:54,746 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 799 selfloop transitions, 750 changer transitions 0/1549 dead transitions. [2023-11-06 22:21:54,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1549 transitions, 44544 flow [2023-11-06 22:21:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:21:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:21:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5213 transitions. [2023-11-06 22:21:54,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256900212314225 [2023-11-06 22:21:54,754 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5213 transitions. [2023-11-06 22:21:54,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5213 transitions. [2023-11-06 22:21:54,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:54,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5213 transitions. [2023-11-06 22:21:54,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 200.5) internal successors, (5213), 26 states have internal predecessors, (5213), 0 states have call successors, (0), 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 22:21:54,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 471.0) internal successors, (12717), 27 states have internal predecessors, (12717), 0 states have call successors, (0), 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 22:21:54,774 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 471.0) internal successors, (12717), 27 states have internal predecessors, (12717), 0 states have call successors, (0), 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 22:21:54,774 INFO L175 Difference]: Start difference. First operand has 553 places, 1437 transitions, 39040 flow. Second operand 26 states and 5213 transitions. [2023-11-06 22:21:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1549 transitions, 44544 flow [2023-11-06 22:21:58,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1549 transitions, 43694 flow, removed 136 selfloop flow, removed 9 redundant places. [2023-11-06 22:21:58,677 INFO L231 Difference]: Finished difference. Result has 569 places, 1505 transitions, 41784 flow [2023-11-06 22:21:58,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=38205, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=41784, PETRI_PLACES=569, PETRI_TRANSITIONS=1505} [2023-11-06 22:21:58,678 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 549 predicate places. [2023-11-06 22:21:58,678 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1505 transitions, 41784 flow [2023-11-06 22:21:58,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 198.13333333333333) internal successors, (2972), 15 states have internal predecessors, (2972), 0 states have call successors, (0), 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 22:21:58,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:58,679 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:58,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-06 22:21:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:58,879 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:58,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1807887105, now seen corresponding path program 62 times [2023-11-06 22:21:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124361468] [2023-11-06 22:21:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:58,993 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 22:21:58,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124361468] [2023-11-06 22:21:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124361468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705558054] [2023-11-06 22:21:58,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:58,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:58,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:58,999 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:59,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-06 22:21:59,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:59,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:21:59,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:59,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:59,316 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 22:21:59,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705558054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:59,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:59,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-06 22:21:59,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334758867] [2023-11-06 22:21:59,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:21:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:21:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:21:59,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:21:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1505 transitions, 41784 flow. Second operand has 18 states, 18 states have (on average 197.83333333333334) internal successors, (3561), 18 states have internal predecessors, (3561), 0 states have call successors, (0), 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 22:21:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:21:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:04,237 INFO L124 PetriNetUnfolderBase]: 3390/5693 cut-off events. [2023-11-06 22:22:04,237 INFO L125 PetriNetUnfolderBase]: For 366614/366614 co-relation queries the response was YES. [2023-11-06 22:22:04,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73527 conditions, 5693 events. 3390/5693 cut-off events. For 366614/366614 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 37536 event pairs, 255 based on Foata normal form. 10/5703 useless extension candidates. Maximal degree in co-relation 73319. Up to 2602 conditions per place. [2023-11-06 22:22:04,383 INFO L140 encePairwiseOnDemand]: 465/471 looper letters, 1062 selfloop transitions, 589 changer transitions 0/1651 dead transitions. [2023-11-06 22:22:04,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1651 transitions, 48548 flow [2023-11-06 22:22:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:22:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:22:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5815 transitions. [2023-11-06 22:22:04,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257266271322937 [2023-11-06 22:22:04,388 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5815 transitions. [2023-11-06 22:22:04,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5815 transitions. [2023-11-06 22:22:04,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:04,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5815 transitions. [2023-11-06 22:22:04,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 200.51724137931035) internal successors, (5815), 29 states have internal predecessors, (5815), 0 states have call successors, (0), 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 22:22:04,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 471.0) internal successors, (14130), 30 states have internal predecessors, (14130), 0 states have call successors, (0), 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 22:22:04,400 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 471.0) internal successors, (14130), 30 states have internal predecessors, (14130), 0 states have call successors, (0), 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 22:22:04,400 INFO L175 Difference]: Start difference. First operand has 569 places, 1505 transitions, 41784 flow. Second operand 29 states and 5815 transitions. [2023-11-06 22:22:04,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1651 transitions, 48548 flow [2023-11-06 22:22:09,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1651 transitions, 47975 flow, removed 169 selfloop flow, removed 12 redundant places. [2023-11-06 22:22:09,455 INFO L231 Difference]: Finished difference. Result has 590 places, 1592 transitions, 45257 flow [2023-11-06 22:22:09,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=41309, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=45257, PETRI_PLACES=590, PETRI_TRANSITIONS=1592} [2023-11-06 22:22:09,457 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 570 predicate places. [2023-11-06 22:22:09,457 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1592 transitions, 45257 flow [2023-11-06 22:22:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 197.83333333333334) internal successors, (3561), 18 states have internal predecessors, (3561), 0 states have call successors, (0), 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 22:22:09,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:09,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:09,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-11-06 22:22:09,664 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:22:09,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1367653209, now seen corresponding path program 63 times [2023-11-06 22:22:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048118985] [2023-11-06 22:22:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:09,749 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 22:22:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:09,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048118985] [2023-11-06 22:22:09,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048118985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:09,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142241122] [2023-11-06 22:22:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:22:09,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:09,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:09,751 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:09,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1a4da0d-1ce2-436b-87bc-3ec8724cf47b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-06 22:22:09,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:22:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:09,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:22:09,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:09,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142241122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:10,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 22:22:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463892840] [2023-11-06 22:22:10,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:22:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:22:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:22:10,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2023-11-06 22:22:10,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1592 transitions, 45257 flow. Second operand has 20 states, 20 states have (on average 197.9) internal successors, (3958), 20 states have internal predecessors, (3958), 0 states have call successors, (0), 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 22:22:10,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:10,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2023-11-06 22:22:10,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand