./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/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_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/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_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:25,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:26,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:26,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:26,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:26,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:26,102 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:26,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:26,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:26,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:26,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:26,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:26,112 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:26,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:26,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:26,115 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:26,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:26,116 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:26,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:26,117 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:26,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:26,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:26,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:26,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:26,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:26,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:26,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:26,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:26,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:26,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:26,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:26,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:26,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:26,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:26,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:26,126 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:26,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:26,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:26,127 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:26,127 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_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2023-11-06 21:53:26,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:26,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:26,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:26,463 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:26,464 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:26,465 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-06 21:53:29,609 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:29,827 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:29,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-06 21:53:29,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/data/cb7fcd694/a29d91f7c6ad4325a210acaf688caee1/FLAG497094977 [2023-11-06 21:53:29,852 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/data/cb7fcd694/a29d91f7c6ad4325a210acaf688caee1 [2023-11-06 21:53:29,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:29,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:29,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:29,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:29,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:29,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:29" (1/1) ... [2023-11-06 21:53:29,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347fc784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:29, skipping insertion in model container [2023-11-06 21:53:29,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:29" (1/1) ... [2023-11-06 21:53:29,893 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:30,071 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_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-11-06 21:53:30,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:30,087 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:30,112 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_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-11-06 21:53:30,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:30,127 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:30,128 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:30,135 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:30,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30 WrapperNode [2023-11-06 21:53:30,135 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:30,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:30,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:30,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:30,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,179 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2023-11-06 21:53:30,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:30,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:30,180 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:30,180 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:30,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,200 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,203 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:30,211 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:30,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:30,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:30,212 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:30,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:30,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:30,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:30,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:30,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:53:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:53:30,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:53:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:53:30,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:53:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:53:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:53:30,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:53:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:30,292 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 21:53:30,398 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:30,400 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:30,666 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:30,794 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:30,796 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:53:30,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:30 BoogieIcfgContainer [2023-11-06 21:53:30,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:30,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:30,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:30,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:30,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:29" (1/3) ... [2023-11-06 21:53:30,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167a22f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:30, skipping insertion in model container [2023-11-06 21:53:30,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (2/3) ... [2023-11-06 21:53:30,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167a22f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:30, skipping insertion in model container [2023-11-06 21:53:30,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:30" (3/3) ... [2023-11-06 21:53:30,808 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-06 21:53:30,815 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:53:30,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:30,826 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:30,826 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:53:30,944 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:53:31,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 111 transitions, 243 flow [2023-11-06 21:53:31,107 INFO L124 PetriNetUnfolderBase]: 7/108 cut-off events. [2023-11-06 21:53:31,107 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:31,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 7/108 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-11-06 21:53:31,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 111 transitions, 243 flow [2023-11-06 21:53:31,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 97 transitions, 212 flow [2023-11-06 21:53:31,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:31,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 97 transitions, 212 flow [2023-11-06 21:53:31,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 97 transitions, 212 flow [2023-11-06 21:53:31,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 212 flow [2023-11-06 21:53:31,176 INFO L124 PetriNetUnfolderBase]: 7/97 cut-off events. [2023-11-06 21:53:31,177 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:31,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 97 events. 7/97 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-11-06 21:53:31,180 INFO L119 LiptonReduction]: Number of co-enabled transitions 1370 [2023-11-06 21:53:35,265 INFO L134 LiptonReduction]: Checked pairs total: 2147 [2023-11-06 21:53:35,265 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-11-06 21:53:35,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:35,288 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;@7bb40c8a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:35,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:53:35,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:53:35,297 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-06 21:53:35,297 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:53:35,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:35,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:35,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:35,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1873234295, now seen corresponding path program 1 times [2023-11-06 21:53:35,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:35,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483436247] [2023-11-06 21:53:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:35,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:35,962 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 21:53:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483436247] [2023-11-06 21:53:35,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483436247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:35,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063183838] [2023-11-06 21:53:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:36,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-06 21:53:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-06 21:53:36,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:36,459 INFO L124 PetriNetUnfolderBase]: 348/576 cut-off events. [2023-11-06 21:53:36,459 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-06 21:53:36,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 576 events. 348/576 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2331 event pairs, 49 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 929. Up to 297 conditions per place. [2023-11-06 21:53:36,473 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2023-11-06 21:53:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2023-11-06 21:53:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:53:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:53:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 698 transitions. [2023-11-06 21:53:36,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139911634756995 [2023-11-06 21:53:36,502 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 698 transitions. [2023-11-06 21:53:36,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 698 transitions. [2023-11-06 21:53:36,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:36,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 698 transitions. [2023-11-06 21:53:36,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.71428571428571) internal successors, (698), 7 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,532 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 698 transitions. [2023-11-06 21:53:36,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2023-11-06 21:53:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:53:36,544 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-11-06 21:53:36,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-06 21:53:36,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 21:53:36,554 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-11-06 21:53:36,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:36,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:36,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:36,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:36,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 514006483, now seen corresponding path program 2 times [2023-11-06 21:53:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210780541] [2023-11-06 21:53:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:36,884 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 21:53:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210780541] [2023-11-06 21:53:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210780541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188772422] [2023-11-06 21:53:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:36,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:36,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-06 21:53:36,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:36,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:36,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-06 21:53:36,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:37,097 INFO L124 PetriNetUnfolderBase]: 264/435 cut-off events. [2023-11-06 21:53:37,098 INFO L125 PetriNetUnfolderBase]: For 680/696 co-relation queries the response was YES. [2023-11-06 21:53:37,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 435 events. 264/435 cut-off events. For 680/696 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1618 event pairs, 15 based on Foata normal form. 28/449 useless extension candidates. Maximal degree in co-relation 899. Up to 246 conditions per place. [2023-11-06 21:53:37,104 INFO L140 encePairwiseOnDemand]: 190/194 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-06 21:53:37,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2023-11-06 21:53:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-11-06 21:53:37,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141752577319587 [2023-11-06 21:53:37,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-11-06 21:53:37,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-11-06 21:53:37,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:37,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-11-06 21:53:37,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,117 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 399 transitions. [2023-11-06 21:53:37,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2023-11-06 21:53:37,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 21:53:37,123 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-11-06 21:53:37,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-06 21:53:37,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 21:53:37,130 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-11-06 21:53:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:37,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:37,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:37,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 948579981, now seen corresponding path program 3 times [2023-11-06 21:53:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130986207] [2023-11-06 21:53:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:37,297 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 21:53:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130986207] [2023-11-06 21:53:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130986207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225596529] [2023-11-06 21:53:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:37,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-06 21:53:37,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:37,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-06 21:53:37,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:37,482 INFO L124 PetriNetUnfolderBase]: 165/300 cut-off events. [2023-11-06 21:53:37,482 INFO L125 PetriNetUnfolderBase]: For 413/430 co-relation queries the response was YES. [2023-11-06 21:53:37,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 300 events. 165/300 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1032 event pairs, 23 based on Foata normal form. 29/328 useless extension candidates. Maximal degree in co-relation 886. Up to 200 conditions per place. [2023-11-06 21:53:37,486 INFO L140 encePairwiseOnDemand]: 190/194 looper letters, 30 selfloop transitions, 7 changer transitions 2/42 dead transitions. [2023-11-06 21:53:37,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 271 flow [2023-11-06 21:53:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2023-11-06 21:53:37,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509020618556701 [2023-11-06 21:53:37,489 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 395 transitions. [2023-11-06 21:53:37,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 395 transitions. [2023-11-06 21:53:37,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:37,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 395 transitions. [2023-11-06 21:53:37,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,495 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 395 transitions. [2023-11-06 21:53:37,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 271 flow [2023-11-06 21:53:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:53:37,499 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-11-06 21:53:37,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-06 21:53:37,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-11-06 21:53:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-11-06 21:53:37,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:37,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:53:37,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:37,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2085323717, now seen corresponding path program 4 times [2023-11-06 21:53:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:37,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146396484] [2023-11-06 21:53:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:37,650 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 21:53:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146396484] [2023-11-06 21:53:37,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146396484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:37,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:37,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882645040] [2023-11-06 21:53:37,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:37,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 194 [2023-11-06 21:53:37,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:37,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 194 [2023-11-06 21:53:37,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:37,857 INFO L124 PetriNetUnfolderBase]: 203/350 cut-off events. [2023-11-06 21:53:37,858 INFO L125 PetriNetUnfolderBase]: For 679/704 co-relation queries the response was YES. [2023-11-06 21:53:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 350 events. 203/350 cut-off events. For 679/704 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1210 event pairs, 23 based on Foata normal form. 25/369 useless extension candidates. Maximal degree in co-relation 1067. Up to 145 conditions per place. [2023-11-06 21:53:37,862 INFO L140 encePairwiseOnDemand]: 188/194 looper letters, 34 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2023-11-06 21:53:37,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 318 flow [2023-11-06 21:53:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:53:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 487 transitions. [2023-11-06 21:53:37,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020618556701031 [2023-11-06 21:53:37,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 487 transitions. [2023-11-06 21:53:37,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 487 transitions. [2023-11-06 21:53:37,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:37,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 487 transitions. [2023-11-06 21:53:37,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,873 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 487 transitions. [2023-11-06 21:53:37,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 318 flow [2023-11-06 21:53:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 308 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 21:53:37,879 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-11-06 21:53:37,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-06 21:53:37,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-06 21:53:37,882 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-11-06 21:53:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:37,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:37,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:37,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:53:37,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:37,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash -648613989, now seen corresponding path program 5 times [2023-11-06 21:53:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459837360] [2023-11-06 21:53:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,109 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 21:53:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459837360] [2023-11-06 21:53:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459837360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619331325] [2023-11-06 21:53:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:38,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-06 21:53:38,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:38,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-06 21:53:38,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:38,355 INFO L124 PetriNetUnfolderBase]: 184/313 cut-off events. [2023-11-06 21:53:38,356 INFO L125 PetriNetUnfolderBase]: For 915/943 co-relation queries the response was YES. [2023-11-06 21:53:38,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 313 events. 184/313 cut-off events. For 915/943 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1050 event pairs, 13 based on Foata normal form. 25/332 useless extension candidates. Maximal degree in co-relation 858. Up to 211 conditions per place. [2023-11-06 21:53:38,360 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 30 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2023-11-06 21:53:38,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 400 flow [2023-11-06 21:53:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:53:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:53:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2023-11-06 21:53:38,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49337260677466865 [2023-11-06 21:53:38,364 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2023-11-06 21:53:38,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2023-11-06 21:53:38,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:38,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2023-11-06 21:53:38,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,372 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,372 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 670 transitions. [2023-11-06 21:53:38,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 400 flow [2023-11-06 21:53:38,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:38,376 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-11-06 21:53:38,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-11-06 21:53:38,377 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-11-06 21:53:38,378 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-11-06 21:53:38,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:38,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:53:38,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:38,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1755165469, now seen corresponding path program 1 times [2023-11-06 21:53:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:38,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595983912] [2023-11-06 21:53:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:38,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,606 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 21:53:38,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595983912] [2023-11-06 21:53:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595983912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:38,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920701566] [2023-11-06 21:53:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:38,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:38,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:38,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:53:38,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:38,820 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 21:53:38,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920701566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:53:38,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 21:53:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717745565] [2023-11-06 21:53:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:53:38,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-06 21:53:38,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:38,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-06 21:53:38,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:39,012 INFO L124 PetriNetUnfolderBase]: 161/264 cut-off events. [2023-11-06 21:53:39,012 INFO L125 PetriNetUnfolderBase]: For 976/1001 co-relation queries the response was YES. [2023-11-06 21:53:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 264 events. 161/264 cut-off events. For 976/1001 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 775 event pairs, 17 based on Foata normal form. 31/284 useless extension candidates. Maximal degree in co-relation 984. Up to 116 conditions per place. [2023-11-06 21:53:39,017 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 37 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-06 21:53:39,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 352 flow [2023-11-06 21:53:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:53:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-11-06 21:53:39,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082474226804123 [2023-11-06 21:53:39,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-11-06 21:53:39,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-11-06 21:53:39,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:39,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-11-06 21:53:39,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,026 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 5 states and 493 transitions. [2023-11-06 21:53:39,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 352 flow [2023-11-06 21:53:39,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 326 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-06 21:53:39,030 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 173 flow [2023-11-06 21:53:39,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2023-11-06 21:53:39,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-06 21:53:39,032 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 173 flow [2023-11-06 21:53:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:39,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:39,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:53:39,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:39,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 952294063, now seen corresponding path program 2 times [2023-11-06 21:53:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415201191] [2023-11-06 21:53:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,464 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 21:53:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415201191] [2023-11-06 21:53:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415201191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917269326] [2023-11-06 21:53:39,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:39,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:39,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:39,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:39,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:39,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:39,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:53:39,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:39,692 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 21:53:39,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:39,905 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 21:53:39,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917269326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:39,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 21:53:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025715184] [2023-11-06 21:53:39,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:53:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:53:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:53:39,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 194 [2023-11-06 21:53:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 173 flow. Second operand has 11 states, 11 states have (on average 89.18181818181819) internal successors, (981), 11 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:39,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 194 [2023-11-06 21:53:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:40,645 INFO L124 PetriNetUnfolderBase]: 478/834 cut-off events. [2023-11-06 21:53:40,645 INFO L125 PetriNetUnfolderBase]: For 2781/2825 co-relation queries the response was YES. [2023-11-06 21:53:40,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3451 conditions, 834 events. 478/834 cut-off events. For 2781/2825 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3862 event pairs, 24 based on Foata normal form. 48/862 useless extension candidates. Maximal degree in co-relation 1868. Up to 353 conditions per place. [2023-11-06 21:53:40,656 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 79 selfloop transitions, 29 changer transitions 33/145 dead transitions. [2023-11-06 21:53:40,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 145 transitions, 1086 flow [2023-11-06 21:53:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:53:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:53:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1947 transitions. [2023-11-06 21:53:40,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47790868924889546 [2023-11-06 21:53:40,665 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1947 transitions. [2023-11-06 21:53:40,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1947 transitions. [2023-11-06 21:53:40,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:40,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1947 transitions. [2023-11-06 21:53:40,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.71428571428571) internal successors, (1947), 21 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 194.0) internal successors, (4268), 22 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,686 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 194.0) internal successors, (4268), 22 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,686 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 173 flow. Second operand 21 states and 1947 transitions. [2023-11-06 21:53:40,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 145 transitions, 1086 flow [2023-11-06 21:53:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 145 transitions, 1069 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:53:40,695 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 446 flow [2023-11-06 21:53:40,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=446, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-11-06 21:53:40,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2023-11-06 21:53:40,696 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 446 flow [2023-11-06 21:53:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 89.18181818181819) internal successors, (981), 11 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:40,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:40,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:53:40,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:40,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash -909111982, now seen corresponding path program 1 times [2023-11-06 21:53:40,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589148075] [2023-11-06 21:53:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,129 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 21:53:41,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589148075] [2023-11-06 21:53:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589148075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627626159] [2023-11-06 21:53:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:41,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:41,132 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:41,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:53:41,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:41,328 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 21:53:41,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:41,550 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 21:53:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627626159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:41,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:53:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2685858] [2023-11-06 21:53:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:53:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:53:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:53:41,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 194 [2023-11-06 21:53:41,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 446 flow. Second operand has 12 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:41,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:41,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 194 [2023-11-06 21:53:41,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:42,260 INFO L124 PetriNetUnfolderBase]: 445/767 cut-off events. [2023-11-06 21:53:42,260 INFO L125 PetriNetUnfolderBase]: For 3549/3570 co-relation queries the response was YES. [2023-11-06 21:53:42,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 767 events. 445/767 cut-off events. For 3549/3570 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3284 event pairs, 8 based on Foata normal form. 43/802 useless extension candidates. Maximal degree in co-relation 2749. Up to 331 conditions per place. [2023-11-06 21:53:42,268 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 61 selfloop transitions, 26 changer transitions 64/157 dead transitions. [2023-11-06 21:53:42,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 157 transitions, 1420 flow [2023-11-06 21:53:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:53:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 21:53:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1580 transitions. [2023-11-06 21:53:42,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790782292298363 [2023-11-06 21:53:42,275 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1580 transitions. [2023-11-06 21:53:42,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1580 transitions. [2023-11-06 21:53:42,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:42,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1580 transitions. [2023-11-06 21:53:42,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.94117647058823) internal successors, (1580), 17 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 194.0) internal successors, (3492), 18 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,290 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 194.0) internal successors, (3492), 18 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,290 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 446 flow. Second operand 17 states and 1580 transitions. [2023-11-06 21:53:42,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 157 transitions, 1420 flow [2023-11-06 21:53:42,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 157 transitions, 1038 flow, removed 155 selfloop flow, removed 10 redundant places. [2023-11-06 21:53:42,308 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 409 flow [2023-11-06 21:53:42,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=409, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-11-06 21:53:42,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-11-06 21:53:42,313 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 409 flow [2023-11-06 21:53:42,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:42,315 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:42,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:42,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:42,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:42,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1999128411, now seen corresponding path program 3 times [2023-11-06 21:53:42,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923397391] [2023-11-06 21:53:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:43,015 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 21:53:43,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:43,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923397391] [2023-11-06 21:53:43,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923397391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:43,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207752654] [2023-11-06 21:53:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:53:43,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:43,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:43,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 21:53:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:43,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:43,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:43,427 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 21:53:43,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:44,166 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 21:53:44,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207752654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:44,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 21:53:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009550664] [2023-11-06 21:53:44,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:44,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:53:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:53:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:53:44,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 194 [2023-11-06 21:53:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 88.61111111111111) internal successors, (1595), 18 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 194 [2023-11-06 21:53:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:46,164 INFO L124 PetriNetUnfolderBase]: 912/1594 cut-off events. [2023-11-06 21:53:46,164 INFO L125 PetriNetUnfolderBase]: For 8692/8823 co-relation queries the response was YES. [2023-11-06 21:53:46,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7715 conditions, 1594 events. 912/1594 cut-off events. For 8692/8823 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8296 event pairs, 22 based on Foata normal form. 131/1685 useless extension candidates. Maximal degree in co-relation 6097. Up to 640 conditions per place. [2023-11-06 21:53:46,181 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 138 selfloop transitions, 65 changer transitions 101/311 dead transitions. [2023-11-06 21:53:46,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 311 transitions, 2903 flow [2023-11-06 21:53:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 21:53:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 21:53:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3617 transitions. [2023-11-06 21:53:46,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780597409463389 [2023-11-06 21:53:46,197 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3617 transitions. [2023-11-06 21:53:46,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3617 transitions. [2023-11-06 21:53:46,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:46,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3617 transitions. [2023-11-06 21:53:46,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 92.74358974358974) internal successors, (3617), 39 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:46,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 194.0) internal successors, (7760), 40 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:46,234 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 194.0) internal successors, (7760), 40 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:46,234 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 409 flow. Second operand 39 states and 3617 transitions. [2023-11-06 21:53:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 311 transitions, 2903 flow [2023-11-06 21:53:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 311 transitions, 2506 flow, removed 183 selfloop flow, removed 8 redundant places. [2023-11-06 21:53:46,274 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 889 flow [2023-11-06 21:53:46,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=889, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-11-06 21:53:46,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2023-11-06 21:53:46,276 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 889 flow [2023-11-06 21:53:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.61111111111111) internal successors, (1595), 18 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:46,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:46,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:46,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:46,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1020637094, now seen corresponding path program 1 times [2023-11-06 21:53:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584345641] [2023-11-06 21:53:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:46,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:46,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584345641] [2023-11-06 21:53:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584345641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908635751] [2023-11-06 21:53:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:46,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:46,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:46,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:46,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:47,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908635751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:47,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:47,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 21:53:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329763541] [2023-11-06 21:53:47,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:47,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:53:47,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:53:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:53:48,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:53:48,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 889 flow. Second operand has 17 states, 17 states have (on average 86.47058823529412) internal successors, (1470), 17 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:48,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:48,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:53:48,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:49,988 INFO L124 PetriNetUnfolderBase]: 1130/2026 cut-off events. [2023-11-06 21:53:49,988 INFO L125 PetriNetUnfolderBase]: For 11958/11993 co-relation queries the response was YES. [2023-11-06 21:53:49,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10147 conditions, 2026 events. 1130/2026 cut-off events. For 11958/11993 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11197 event pairs, 4 based on Foata normal form. 87/2101 useless extension candidates. Maximal degree in co-relation 9468. Up to 727 conditions per place. [2023-11-06 21:53:50,012 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 162 selfloop transitions, 112 changer transitions 102/384 dead transitions. [2023-11-06 21:53:50,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 384 transitions, 3724 flow [2023-11-06 21:53:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 21:53:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 21:53:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3551 transitions. [2023-11-06 21:53:50,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46933650541897964 [2023-11-06 21:53:50,020 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3551 transitions. [2023-11-06 21:53:50,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3551 transitions. [2023-11-06 21:53:50,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:50,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3551 transitions. [2023-11-06 21:53:50,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 91.05128205128206) internal successors, (3551), 39 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 194.0) internal successors, (7760), 40 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,050 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 194.0) internal successors, (7760), 40 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,050 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 889 flow. Second operand 39 states and 3551 transitions. [2023-11-06 21:53:50,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 384 transitions, 3724 flow [2023-11-06 21:53:50,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 384 transitions, 2915 flow, removed 355 selfloop flow, removed 14 redundant places. [2023-11-06 21:53:50,136 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1505 flow [2023-11-06 21:53:50,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1505, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2023-11-06 21:53:50,138 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2023-11-06 21:53:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1505 flow [2023-11-06 21:53:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.47058823529412) internal successors, (1470), 17 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:50,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:50,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:53:50,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:50,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 643154782, now seen corresponding path program 2 times [2023-11-06 21:53:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716953727] [2023-11-06 21:53:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716953727] [2023-11-06 21:53:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716953727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224613688] [2023-11-06 21:53:50,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:50,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,734 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:50,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:50,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:51,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224613688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:51,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:51,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 21:53:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885877857] [2023-11-06 21:53:51,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:51,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:53:51,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:53:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:53:51,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:53:51,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1505 flow. Second operand has 18 states, 18 states have (on average 86.44444444444444) internal successors, (1556), 18 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:51,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:51,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:53:51,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:53,863 INFO L124 PetriNetUnfolderBase]: 1292/2282 cut-off events. [2023-11-06 21:53:53,863 INFO L125 PetriNetUnfolderBase]: For 13001/13144 co-relation queries the response was YES. [2023-11-06 21:53:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2282 events. 1292/2282 cut-off events. For 13001/13144 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13077 event pairs, 28 based on Foata normal form. 153/2387 useless extension candidates. Maximal degree in co-relation 10761. Up to 643 conditions per place. [2023-11-06 21:53:53,896 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 145 selfloop transitions, 88 changer transitions 133/380 dead transitions. [2023-11-06 21:53:53,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 380 transitions, 3984 flow [2023-11-06 21:53:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 21:53:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 21:53:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3164 transitions. [2023-11-06 21:53:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465979381443299 [2023-11-06 21:53:53,919 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3164 transitions. [2023-11-06 21:53:53,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3164 transitions. [2023-11-06 21:53:53,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:53,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3164 transitions. [2023-11-06 21:53:53,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.4) internal successors, (3164), 35 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 21:53:53,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 194.0) internal successors, (6984), 36 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:53,946 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 194.0) internal successors, (6984), 36 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:53,946 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1505 flow. Second operand 35 states and 3164 transitions. [2023-11-06 21:53:53,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 380 transitions, 3984 flow [2023-11-06 21:53:54,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 380 transitions, 3357 flow, removed 222 selfloop flow, removed 19 redundant places. [2023-11-06 21:53:54,058 INFO L231 Difference]: Finished difference. Result has 131 places, 157 transitions, 1480 flow [2023-11-06 21:53:54,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1480, PETRI_PLACES=131, PETRI_TRANSITIONS=157} [2023-11-06 21:53:54,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2023-11-06 21:53:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 157 transitions, 1480 flow [2023-11-06 21:53:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.44444444444444) internal successors, (1556), 18 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:53:54,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:54,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1623865630, now seen corresponding path program 3 times [2023-11-06 21:53:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009291862] [2023-11-06 21:53:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009291862] [2023-11-06 21:53:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009291862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397247955] [2023-11-06 21:53:54,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:53:54,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:54,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:54,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:53:54,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:54,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:54,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:54,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397247955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:55,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:55,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 21:53:55,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783339422] [2023-11-06 21:53:55,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:53:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:53:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:53:55,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:53:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 157 transitions, 1480 flow. Second operand has 18 states, 18 states have (on average 86.27777777777777) internal successors, (1553), 18 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:55,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:55,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:53:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:57,681 INFO L124 PetriNetUnfolderBase]: 1412/2522 cut-off events. [2023-11-06 21:53:57,682 INFO L125 PetriNetUnfolderBase]: For 15462/15505 co-relation queries the response was YES. [2023-11-06 21:53:57,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12792 conditions, 2522 events. 1412/2522 cut-off events. For 15462/15505 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14358 event pairs, 28 based on Foata normal form. 107/2619 useless extension candidates. Maximal degree in co-relation 12189. Up to 540 conditions per place. [2023-11-06 21:53:57,715 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 179 selfloop transitions, 98 changer transitions 136/425 dead transitions. [2023-11-06 21:53:57,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 425 transitions, 4475 flow [2023-11-06 21:53:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 21:53:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 21:53:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3375 transitions. [2023-11-06 21:53:57,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701866815268877 [2023-11-06 21:53:57,724 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3375 transitions. [2023-11-06 21:53:57,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3375 transitions. [2023-11-06 21:53:57,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:57,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3375 transitions. [2023-11-06 21:53:57,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 91.21621621621621) internal successors, (3375), 37 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:57,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 194.0) internal successors, (7372), 38 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:57,747 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 194.0) internal successors, (7372), 38 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:57,748 INFO L175 Difference]: Start difference. First operand has 131 places, 157 transitions, 1480 flow. Second operand 37 states and 3375 transitions. [2023-11-06 21:53:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 425 transitions, 4475 flow [2023-11-06 21:53:57,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 425 transitions, 3896 flow, removed 267 selfloop flow, removed 17 redundant places. [2023-11-06 21:53:57,880 INFO L231 Difference]: Finished difference. Result has 153 places, 193 transitions, 2008 flow [2023-11-06 21:53:57,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2008, PETRI_PLACES=153, PETRI_TRANSITIONS=193} [2023-11-06 21:53:57,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2023-11-06 21:53:57,881 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 193 transitions, 2008 flow [2023-11-06 21:53:57,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.27777777777777) internal successors, (1553), 18 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:57,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:57,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:57,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:58,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:53:58,093 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:53:58,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1845984050, now seen corresponding path program 2 times [2023-11-06 21:53:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321302382] [2023-11-06 21:53:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:58,448 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 21:53:58,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:58,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321302382] [2023-11-06 21:53:58,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321302382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:58,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588337642] [2023-11-06 21:53:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:58,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:58,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:58,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:58,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:58,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:58,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:58,741 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 21:53:58,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:59,237 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 21:53:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588337642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:59,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-06 21:53:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396345758] [2023-11-06 21:53:59,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:53:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:53:59,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:53:59,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 194 [2023-11-06 21:53:59,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 193 transitions, 2008 flow. Second operand has 17 states, 17 states have (on average 86.29411764705883) internal successors, (1467), 17 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:59,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:59,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 194 [2023-11-06 21:53:59,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:02,061 INFO L124 PetriNetUnfolderBase]: 2301/3730 cut-off events. [2023-11-06 21:54:02,061 INFO L125 PetriNetUnfolderBase]: For 19443/19443 co-relation queries the response was YES. [2023-11-06 21:54:02,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 3730 events. 2301/3730 cut-off events. For 19443/19443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19200 event pairs, 91 based on Foata normal form. 102/3832 useless extension candidates. Maximal degree in co-relation 18499. Up to 1342 conditions per place. [2023-11-06 21:54:02,105 INFO L140 encePairwiseOnDemand]: 184/194 looper letters, 234 selfloop transitions, 100 changer transitions 163/497 dead transitions. [2023-11-06 21:54:02,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 497 transitions, 5616 flow [2023-11-06 21:54:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 21:54:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 21:54:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4398 transitions. [2023-11-06 21:54:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462655165158847 [2023-11-06 21:54:02,113 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4398 transitions. [2023-11-06 21:54:02,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4398 transitions. [2023-11-06 21:54:02,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:02,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4398 transitions. [2023-11-06 21:54:02,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 89.75510204081633) internal successors, (4398), 49 states have internal predecessors, (4398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 194.0) internal successors, (9700), 50 states have internal predecessors, (9700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,151 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 194.0) internal successors, (9700), 50 states have internal predecessors, (9700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,151 INFO L175 Difference]: Start difference. First operand has 153 places, 193 transitions, 2008 flow. Second operand 49 states and 4398 transitions. [2023-11-06 21:54:02,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 497 transitions, 5616 flow [2023-11-06 21:54:02,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 497 transitions, 5295 flow, removed 135 selfloop flow, removed 20 redundant places. [2023-11-06 21:54:02,353 INFO L231 Difference]: Finished difference. Result has 198 places, 229 transitions, 2648 flow [2023-11-06 21:54:02,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2648, PETRI_PLACES=198, PETRI_TRANSITIONS=229} [2023-11-06 21:54:02,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2023-11-06 21:54:02,354 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 229 transitions, 2648 flow [2023-11-06 21:54:02,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.29411764705883) internal successors, (1467), 17 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:02,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:02,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:54:02,555 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1437314621, now seen corresponding path program 4 times [2023-11-06 21:54:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440827772] [2023-11-06 21:54:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440827772] [2023-11-06 21:54:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440827772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755783739] [2023-11-06 21:54:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:03,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:03,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:54:03,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:03,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:03,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:03,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755783739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:05,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:54:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726765245] [2023-11-06 21:54:05,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:05,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:54:05,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 229 transitions, 2648 flow. Second operand has 24 states, 24 states have (on average 86.20833333333333) internal successors, (2069), 24 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:05,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:05,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:54:05,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:10,552 INFO L124 PetriNetUnfolderBase]: 2421/4263 cut-off events. [2023-11-06 21:54:10,552 INFO L125 PetriNetUnfolderBase]: For 99435/99767 co-relation queries the response was YES. [2023-11-06 21:54:10,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31048 conditions, 4263 events. 2421/4263 cut-off events. For 99435/99767 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26878 event pairs, 10 based on Foata normal form. 258/4452 useless extension candidates. Maximal degree in co-relation 30374. Up to 1139 conditions per place. [2023-11-06 21:54:10,621 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 259 selfloop transitions, 224 changer transitions 207/709 dead transitions. [2023-11-06 21:54:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 709 transitions, 10459 flow [2023-11-06 21:54:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-06 21:54:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-06 21:54:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6238 transitions. [2023-11-06 21:54:10,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46600926340953236 [2023-11-06 21:54:10,632 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6238 transitions. [2023-11-06 21:54:10,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6238 transitions. [2023-11-06 21:54:10,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:10,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6238 transitions. [2023-11-06 21:54:10,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 90.40579710144928) internal successors, (6238), 69 states have internal predecessors, (6238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 194.0) internal successors, (13580), 70 states have internal predecessors, (13580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,666 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 194.0) internal successors, (13580), 70 states have internal predecessors, (13580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,666 INFO L175 Difference]: Start difference. First operand has 198 places, 229 transitions, 2648 flow. Second operand 69 states and 6238 transitions. [2023-11-06 21:54:10,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 709 transitions, 10459 flow [2023-11-06 21:54:11,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 709 transitions, 8673 flow, removed 875 selfloop flow, removed 26 redundant places. [2023-11-06 21:54:11,101 INFO L231 Difference]: Finished difference. Result has 227 places, 315 transitions, 4157 flow [2023-11-06 21:54:11,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4157, PETRI_PLACES=227, PETRI_TRANSITIONS=315} [2023-11-06 21:54:11,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2023-11-06 21:54:11,102 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 315 transitions, 4157 flow [2023-11-06 21:54:11,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.20833333333333) internal successors, (2069), 24 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:11,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:11,173 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:11,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:11,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:11,373 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:11,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash 868766931, now seen corresponding path program 5 times [2023-11-06 21:54:11,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:11,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623585071] [2023-11-06 21:54:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623585071] [2023-11-06 21:54:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623585071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796485081] [2023-11-06 21:54:11,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:11,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:11,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:11,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:54:11,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 21:54:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:11,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:11,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:12,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796485081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:14,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:14,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-06 21:54:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967287803] [2023-11-06 21:54:14,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:14,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 21:54:14,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 21:54:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:54:14,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:54:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 315 transitions, 4157 flow. Second operand has 23 states, 23 states have (on average 86.21739130434783) internal successors, (1983), 23 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 21:54:14,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:14,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:54:14,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:21,054 INFO L124 PetriNetUnfolderBase]: 3400/6038 cut-off events. [2023-11-06 21:54:21,054 INFO L125 PetriNetUnfolderBase]: For 123328/123473 co-relation queries the response was YES. [2023-11-06 21:54:21,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43171 conditions, 6038 events. 3400/6038 cut-off events. For 123328/123473 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40851 event pairs, 20 based on Foata normal form. 299/6297 useless extension candidates. Maximal degree in co-relation 42399. Up to 1391 conditions per place. [2023-11-06 21:54:21,132 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 316 selfloop transitions, 301 changer transitions 270/901 dead transitions. [2023-11-06 21:54:21,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 901 transitions, 13398 flow [2023-11-06 21:54:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 21:54:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-06 21:54:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6114 transitions. [2023-11-06 21:54:21,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038005847053393 [2023-11-06 21:54:21,147 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6114 transitions. [2023-11-06 21:54:21,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6114 transitions. [2023-11-06 21:54:21,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:21,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6114 transitions. [2023-11-06 21:54:21,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 91.25373134328358) internal successors, (6114), 67 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:21,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 194.0) internal successors, (13192), 68 states have internal predecessors, (13192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:21,183 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 194.0) internal successors, (13192), 68 states have internal predecessors, (13192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:21,184 INFO L175 Difference]: Start difference. First operand has 227 places, 315 transitions, 4157 flow. Second operand 67 states and 6114 transitions. [2023-11-06 21:54:21,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 901 transitions, 13398 flow [2023-11-06 21:54:22,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 901 transitions, 11001 flow, removed 1170 selfloop flow, removed 27 redundant places. [2023-11-06 21:54:22,362 INFO L231 Difference]: Finished difference. Result has 265 places, 426 transitions, 6141 flow [2023-11-06 21:54:22,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=6141, PETRI_PLACES=265, PETRI_TRANSITIONS=426} [2023-11-06 21:54:22,363 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2023-11-06 21:54:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 426 transitions, 6141 flow [2023-11-06 21:54:22,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 86.21739130434783) internal successors, (1983), 23 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 21:54:22,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:22,364 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:22,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:22,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:22,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:22,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 125550674, now seen corresponding path program 6 times [2023-11-06 21:54:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:22,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151894255] [2023-11-06 21:54:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151894255] [2023-11-06 21:54:23,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151894255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:23,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85842465] [2023-11-06 21:54:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:23,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:23,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:54:23,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 21:54:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:23,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:23,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:23,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85842465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:25,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:54:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958908382] [2023-11-06 21:54:25,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:25,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:54:25,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 426 transitions, 6141 flow. Second operand has 24 states, 24 states have (on average 86.33333333333333) internal successors, (2072), 24 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:25,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:54:25,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:30,652 INFO L124 PetriNetUnfolderBase]: 3837/6761 cut-off events. [2023-11-06 21:54:30,652 INFO L125 PetriNetUnfolderBase]: For 126613/127070 co-relation queries the response was YES. [2023-11-06 21:54:30,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48879 conditions, 6761 events. 3837/6761 cut-off events. For 126613/127070 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46701 event pairs, 52 based on Foata normal form. 409/7046 useless extension candidates. Maximal degree in co-relation 48631. Up to 1799 conditions per place. [2023-11-06 21:54:30,722 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 322 selfloop transitions, 244 changer transitions 319/912 dead transitions. [2023-11-06 21:54:30,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 912 transitions, 14717 flow [2023-11-06 21:54:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 21:54:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-06 21:54:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5143 transitions. [2023-11-06 21:54:30,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650931452342196 [2023-11-06 21:54:30,730 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5143 transitions. [2023-11-06 21:54:30,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5143 transitions. [2023-11-06 21:54:30,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:30,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5143 transitions. [2023-11-06 21:54:30,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 90.2280701754386) internal successors, (5143), 57 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 194.0) internal successors, (11252), 58 states have internal predecessors, (11252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,755 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 194.0) internal successors, (11252), 58 states have internal predecessors, (11252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,756 INFO L175 Difference]: Start difference. First operand has 265 places, 426 transitions, 6141 flow. Second operand 57 states and 5143 transitions. [2023-11-06 21:54:30,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 912 transitions, 14717 flow [2023-11-06 21:54:31,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 912 transitions, 11856 flow, removed 1177 selfloop flow, removed 38 redundant places. [2023-11-06 21:54:31,756 INFO L231 Difference]: Finished difference. Result has 274 places, 460 transitions, 6459 flow [2023-11-06 21:54:31,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=6459, PETRI_PLACES=274, PETRI_TRANSITIONS=460} [2023-11-06 21:54:31,757 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2023-11-06 21:54:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 460 transitions, 6459 flow [2023-11-06 21:54:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.33333333333333) internal successors, (2072), 24 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:31,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:31,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:54:31,964 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:31,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash -572591217, now seen corresponding path program 7 times [2023-11-06 21:54:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285659305] [2023-11-06 21:54:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285659305] [2023-11-06 21:54:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285659305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670300452] [2023-11-06 21:54:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:32,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:32,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:32,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:32,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:33,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:35,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670300452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:35,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:35,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:54:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744596559] [2023-11-06 21:54:35,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:35,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:54:35,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 460 transitions, 6459 flow. Second operand has 24 states, 24 states have (on average 86.125) internal successors, (2067), 24 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:35,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:54:35,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:42,164 INFO L124 PetriNetUnfolderBase]: 4235/7561 cut-off events. [2023-11-06 21:54:42,165 INFO L125 PetriNetUnfolderBase]: For 113147/113356 co-relation queries the response was YES. [2023-11-06 21:54:42,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50493 conditions, 7561 events. 4235/7561 cut-off events. For 113147/113356 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 53146 event pairs, 56 based on Foata normal form. 381/7902 useless extension candidates. Maximal degree in co-relation 50261. Up to 1720 conditions per place. [2023-11-06 21:54:42,249 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 381 selfloop transitions, 342 changer transitions 272/1011 dead transitions. [2023-11-06 21:54:42,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1011 transitions, 14944 flow [2023-11-06 21:54:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 21:54:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 21:54:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5739 transitions. [2023-11-06 21:54:42,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695630829651448 [2023-11-06 21:54:42,261 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5739 transitions. [2023-11-06 21:54:42,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5739 transitions. [2023-11-06 21:54:42,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:42,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5739 transitions. [2023-11-06 21:54:42,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 91.0952380952381) internal successors, (5739), 63 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 194.0) internal successors, (12416), 64 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,289 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 194.0) internal successors, (12416), 64 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,289 INFO L175 Difference]: Start difference. First operand has 274 places, 460 transitions, 6459 flow. Second operand 63 states and 5739 transitions. [2023-11-06 21:54:42,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1011 transitions, 14944 flow [2023-11-06 21:54:43,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1011 transitions, 12885 flow, removed 852 selfloop flow, removed 35 redundant places. [2023-11-06 21:54:43,225 INFO L231 Difference]: Finished difference. Result has 301 places, 547 transitions, 8238 flow [2023-11-06 21:54:43,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=5663, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=8238, PETRI_PLACES=301, PETRI_TRANSITIONS=547} [2023-11-06 21:54:43,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2023-11-06 21:54:43,226 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 547 transitions, 8238 flow [2023-11-06 21:54:43,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.125) internal successors, (2067), 24 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:43,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:43,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:43,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 21:54:43,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:54:43,428 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:43,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1548974926, now seen corresponding path program 8 times [2023-11-06 21:54:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:43,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865100182] [2023-11-06 21:54:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:43,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:43,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865100182] [2023-11-06 21:54:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865100182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:43,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533938402] [2023-11-06 21:54:43,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:43,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:44,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:44,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:44,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:44,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:44,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533938402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:46,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:46,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:54:46,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175280230] [2023-11-06 21:54:46,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:46,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:47,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:54:47,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 547 transitions, 8238 flow. Second operand has 24 states, 24 states have (on average 86.20833333333333) internal successors, (2069), 24 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:47,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:47,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:54:47,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:54,692 INFO L124 PetriNetUnfolderBase]: 5074/9130 cut-off events. [2023-11-06 21:54:54,692 INFO L125 PetriNetUnfolderBase]: For 136413/136594 co-relation queries the response was YES. [2023-11-06 21:54:54,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62284 conditions, 9130 events. 5074/9130 cut-off events. For 136413/136594 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 66610 event pairs, 70 based on Foata normal form. 379/9449 useless extension candidates. Maximal degree in co-relation 62174. Up to 2060 conditions per place. [2023-11-06 21:54:54,829 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 460 selfloop transitions, 382 changer transitions 343/1201 dead transitions. [2023-11-06 21:54:54,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1201 transitions, 18414 flow [2023-11-06 21:54:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-06 21:54:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-11-06 21:54:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6561 transitions. [2023-11-06 21:54:54,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697164948453608 [2023-11-06 21:54:54,847 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6561 transitions. [2023-11-06 21:54:54,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6561 transitions. [2023-11-06 21:54:54,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:54,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6561 transitions. [2023-11-06 21:54:54,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 91.125) internal successors, (6561), 72 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 194.0) internal successors, (14162), 73 states have internal predecessors, (14162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,887 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 194.0) internal successors, (14162), 73 states have internal predecessors, (14162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,887 INFO L175 Difference]: Start difference. First operand has 301 places, 547 transitions, 8238 flow. Second operand 72 states and 6561 transitions. [2023-11-06 21:54:54,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1201 transitions, 18414 flow [2023-11-06 21:54:56,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1201 transitions, 16991 flow, removed 617 selfloop flow, removed 40 redundant places. [2023-11-06 21:54:56,057 INFO L231 Difference]: Finished difference. Result has 341 places, 663 transitions, 10996 flow [2023-11-06 21:54:56,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10996, PETRI_PLACES=341, PETRI_TRANSITIONS=663} [2023-11-06 21:54:56,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-11-06 21:54:56,059 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 663 transitions, 10996 flow [2023-11-06 21:54:56,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.20833333333333) internal successors, (2069), 24 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:56,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:56,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:56,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 21:54:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:54:56,270 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:54:56,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:56,270 INFO L85 PathProgramCache]: Analyzing trace with hash -250892028, now seen corresponding path program 9 times [2023-11-06 21:54:56,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:56,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444877226] [2023-11-06 21:54:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:56,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444877226] [2023-11-06 21:54:56,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444877226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:56,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710485039] [2023-11-06 21:54:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:56,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:56,787 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:56,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:56,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 21:54:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:56,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:57,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:57,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:59,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710485039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:59,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:54:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898727095] [2023-11-06 21:54:59,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:59,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:59,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 194 [2023-11-06 21:54:59,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 663 transitions, 10996 flow. Second operand has 24 states, 24 states have (on average 83.79166666666667) internal successors, (2011), 24 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:59,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:59,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 194 [2023-11-06 21:54:59,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:08,492 INFO L124 PetriNetUnfolderBase]: 7987/12936 cut-off events. [2023-11-06 21:55:08,492 INFO L125 PetriNetUnfolderBase]: For 224293/224293 co-relation queries the response was YES. [2023-11-06 21:55:08,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88461 conditions, 12936 events. 7987/12936 cut-off events. For 224293/224293 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 84038 event pairs, 569 based on Foata normal form. 238/13174 useless extension candidates. Maximal degree in co-relation 88268. Up to 4714 conditions per place. [2023-11-06 21:55:08,807 INFO L140 encePairwiseOnDemand]: 185/194 looper letters, 632 selfloop transitions, 364 changer transitions 294/1290 dead transitions. [2023-11-06 21:55:08,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1290 transitions, 21560 flow [2023-11-06 21:55:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-06 21:55:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-11-06 21:55:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 7727 transitions. [2023-11-06 21:55:08,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526124648547329 [2023-11-06 21:55:08,818 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 7727 transitions. [2023-11-06 21:55:08,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 7727 transitions. [2023-11-06 21:55:08,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:08,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 7727 transitions. [2023-11-06 21:55:08,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 87.80681818181819) internal successors, (7727), 88 states have internal predecessors, (7727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 194.0) internal successors, (17266), 89 states have internal predecessors, (17266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,852 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 194.0) internal successors, (17266), 89 states have internal predecessors, (17266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,853 INFO L175 Difference]: Start difference. First operand has 341 places, 663 transitions, 10996 flow. Second operand 88 states and 7727 transitions. [2023-11-06 21:55:08,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1290 transitions, 21560 flow [2023-11-06 21:55:10,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1290 transitions, 19140 flow, removed 870 selfloop flow, removed 36 redundant places. [2023-11-06 21:55:10,493 INFO L231 Difference]: Finished difference. Result has 414 places, 757 transitions, 12826 flow [2023-11-06 21:55:10,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=9782, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=12826, PETRI_PLACES=414, PETRI_TRANSITIONS=757} [2023-11-06 21:55:10,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2023-11-06 21:55:10,495 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 757 transitions, 12826 flow [2023-11-06 21:55:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.79166666666667) internal successors, (2011), 24 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:10,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:10,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:10,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 21:55:10,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:10,696 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:10,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1927601803, now seen corresponding path program 10 times [2023-11-06 21:55:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:10,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929524783] [2023-11-06 21:55:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:11,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929524783] [2023-11-06 21:55:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929524783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:11,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152048361] [2023-11-06 21:55:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:11,311 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:11,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:55:11,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:11,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:55:11,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:11,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152048361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:13,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:55:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282411180] [2023-11-06 21:55:13,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:55:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:55:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 757 transitions, 12826 flow. Second operand has 24 states, 24 states have (on average 85.95833333333333) internal successors, (2063), 24 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:55:13,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:21,726 INFO L124 PetriNetUnfolderBase]: 5960/10688 cut-off events. [2023-11-06 21:55:21,726 INFO L125 PetriNetUnfolderBase]: For 627883/629450 co-relation queries the response was YES. [2023-11-06 21:55:21,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103903 conditions, 10688 events. 5960/10688 cut-off events. For 627883/629450 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 80258 event pairs, 220 based on Foata normal form. 595/11179 useless extension candidates. Maximal degree in co-relation 103747. Up to 3011 conditions per place. [2023-11-06 21:55:21,963 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 626 selfloop transitions, 318 changer transitions 239/1236 dead transitions. [2023-11-06 21:55:21,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1236 transitions, 24609 flow [2023-11-06 21:55:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 21:55:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 21:55:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5686 transitions. [2023-11-06 21:55:22,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46522664048437246 [2023-11-06 21:55:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5686 transitions. [2023-11-06 21:55:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5686 transitions. [2023-11-06 21:55:22,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:22,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5686 transitions. [2023-11-06 21:55:22,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 90.25396825396825) internal successors, (5686), 63 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 194.0) internal successors, (12416), 64 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,127 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 194.0) internal successors, (12416), 64 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,128 INFO L175 Difference]: Start difference. First operand has 414 places, 757 transitions, 12826 flow. Second operand 63 states and 5686 transitions. [2023-11-06 21:55:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1236 transitions, 24609 flow [2023-11-06 21:55:25,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1236 transitions, 20664 flow, removed 1938 selfloop flow, removed 53 redundant places. [2023-11-06 21:55:25,069 INFO L231 Difference]: Finished difference. Result has 399 places, 842 transitions, 14574 flow [2023-11-06 21:55:25,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=11933, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=14574, PETRI_PLACES=399, PETRI_TRANSITIONS=842} [2023-11-06 21:55:25,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2023-11-06 21:55:25,071 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 842 transitions, 14574 flow [2023-11-06 21:55:25,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.95833333333333) internal successors, (2063), 24 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:25,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:25,072 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:25,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:25,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:25,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1939210203, now seen corresponding path program 11 times [2023-11-06 21:55:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:25,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24770871] [2023-11-06 21:55:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:25,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:26,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24770871] [2023-11-06 21:55:26,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24770871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366433725] [2023-11-06 21:55:26,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:26,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:26,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:26,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:55:26,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 21:55:26,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:26,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:55:26,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:27,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366433725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:30,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-06 21:55:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351178010] [2023-11-06 21:55:30,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:55:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:55:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:55:30,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:55:30,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 842 transitions, 14574 flow. Second operand has 30 states, 30 states have (on average 86.1) internal successors, (2583), 30 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:30,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:55:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:48,029 INFO L124 PetriNetUnfolderBase]: 8512/15110 cut-off events. [2023-11-06 21:55:48,029 INFO L125 PetriNetUnfolderBase]: For 461973/462724 co-relation queries the response was YES. [2023-11-06 21:55:48,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127991 conditions, 15110 events. 8512/15110 cut-off events. For 461973/462724 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 117364 event pairs, 244 based on Foata normal form. 489/15381 useless extension candidates. Maximal degree in co-relation 127829. Up to 3382 conditions per place. [2023-11-06 21:55:48,352 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 601 selfloop transitions, 852 changer transitions 445/1919 dead transitions. [2023-11-06 21:55:48,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1919 transitions, 35106 flow [2023-11-06 21:55:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-06 21:55:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2023-11-06 21:55:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 9956 transitions. [2023-11-06 21:55:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47082190485198144 [2023-11-06 21:55:48,367 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 9956 transitions. [2023-11-06 21:55:48,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 9956 transitions. [2023-11-06 21:55:48,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:48,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 9956 transitions. [2023-11-06 21:55:48,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 91.33944954128441) internal successors, (9956), 109 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 194.0) internal successors, (21340), 110 states have internal predecessors, (21340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,425 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 194.0) internal successors, (21340), 110 states have internal predecessors, (21340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:48,425 INFO L175 Difference]: Start difference. First operand has 399 places, 842 transitions, 14574 flow. Second operand 109 states and 9956 transitions. [2023-11-06 21:55:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1919 transitions, 35106 flow [2023-11-06 21:55:52,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1919 transitions, 33122 flow, removed 971 selfloop flow, removed 27 redundant places. [2023-11-06 21:55:52,864 INFO L231 Difference]: Finished difference. Result has 487 places, 1148 transitions, 22307 flow [2023-11-06 21:55:52,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=13994, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=22307, PETRI_PLACES=487, PETRI_TRANSITIONS=1148} [2023-11-06 21:55:52,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 457 predicate places. [2023-11-06 21:55:52,866 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1148 transitions, 22307 flow [2023-11-06 21:55:52,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.1) internal successors, (2583), 30 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:52,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:52,866 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:52,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 21:55:53,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:53,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:55:53,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2093328235, now seen corresponding path program 4 times [2023-11-06 21:55:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480011031] [2023-11-06 21:55:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:54,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480011031] [2023-11-06 21:55:54,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480011031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940586649] [2023-11-06 21:55:54,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:54,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:54,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:55:54,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:54,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:55:54,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:54,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940586649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:57,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:57,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-06 21:55:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441558668] [2023-11-06 21:55:57,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:57,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:55:57,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:55:57,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:55:57,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 194 [2023-11-06 21:55:57,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1148 transitions, 22307 flow. Second operand has 30 states, 30 states have (on average 87.7) internal successors, (2631), 30 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:57,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:57,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 194 [2023-11-06 21:55:57,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:12,879 INFO L124 PetriNetUnfolderBase]: 8913/16003 cut-off events. [2023-11-06 21:56:12,879 INFO L125 PetriNetUnfolderBase]: For 769176/769921 co-relation queries the response was YES. [2023-11-06 21:56:13,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147365 conditions, 16003 events. 8913/16003 cut-off events. For 769176/769921 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 125742 event pairs, 534 based on Foata normal form. 433/16258 useless extension candidates. Maximal degree in co-relation 147103. Up to 4848 conditions per place. [2023-11-06 21:56:13,213 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 1002 selfloop transitions, 467 changer transitions 422/1912 dead transitions. [2023-11-06 21:56:13,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1912 transitions, 37425 flow [2023-11-06 21:56:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-11-06 21:56:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-11-06 21:56:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8652 transitions. [2023-11-06 21:56:13,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4795477219820419 [2023-11-06 21:56:13,222 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8652 transitions. [2023-11-06 21:56:13,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8652 transitions. [2023-11-06 21:56:13,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:13,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8652 transitions. [2023-11-06 21:56:13,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 93.03225806451613) internal successors, (8652), 93 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:13,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 194.0) internal successors, (18236), 94 states have internal predecessors, (18236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:13,259 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 194.0) internal successors, (18236), 94 states have internal predecessors, (18236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:13,259 INFO L175 Difference]: Start difference. First operand has 487 places, 1148 transitions, 22307 flow. Second operand 93 states and 8652 transitions. [2023-11-06 21:56:13,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1912 transitions, 37425 flow [2023-11-06 21:56:24,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1912 transitions, 33974 flow, removed 1648 selfloop flow, removed 42 redundant places. [2023-11-06 21:56:24,265 INFO L231 Difference]: Finished difference. Result has 526 places, 1255 transitions, 23172 flow [2023-11-06 21:56:24,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=19636, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=23172, PETRI_PLACES=526, PETRI_TRANSITIONS=1255} [2023-11-06 21:56:24,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 496 predicate places. [2023-11-06 21:56:24,267 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 1255 transitions, 23172 flow [2023-11-06 21:56:24,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 87.7) internal successors, (2631), 30 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:24,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:56:24,267 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:24,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:24,468 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:56:24,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -645976058, now seen corresponding path program 12 times [2023-11-06 21:56:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:24,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397560975] [2023-11-06 21:56:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397560975] [2023-11-06 21:56:25,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397560975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117110795] [2023-11-06 21:56:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:56:25,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:25,347 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5b4b06a-7789-49a6-ae85-faa05b5c49a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:56:25,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 21:56:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:25,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:56:25,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:26,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117110795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:29,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:29,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-06 21:56:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238431384] [2023-11-06 21:56:29,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:56:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:56:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:56:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 194 [2023-11-06 21:56:29,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 1255 transitions, 23172 flow. Second operand has 30 states, 30 states have (on average 86.26666666666667) internal successors, (2588), 30 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:29,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:56:29,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 194 [2023-11-06 21:56:29,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:56:48,892 INFO L124 PetriNetUnfolderBase]: 10700/19073 cut-off events. [2023-11-06 21:56:48,892 INFO L125 PetriNetUnfolderBase]: For 776250/778030 co-relation queries the response was YES. [2023-11-06 21:56:49,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175143 conditions, 19073 events. 10700/19073 cut-off events. For 776250/778030 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 153702 event pairs, 128 based on Foata normal form. 1240/20068 useless extension candidates. Maximal degree in co-relation 174966. Up to 4478 conditions per place. [2023-11-06 21:56:49,355 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 731 selfloop transitions, 734 changer transitions 664/2208 dead transitions. [2023-11-06 21:56:49,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 2208 transitions, 45721 flow [2023-11-06 21:56:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-06 21:56:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-11-06 21:56:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7773 transitions. [2023-11-06 21:56:49,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46589546871253895 [2023-11-06 21:56:49,364 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7773 transitions. [2023-11-06 21:56:49,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7773 transitions. [2023-11-06 21:56:49,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:56:49,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7773 transitions. [2023-11-06 21:56:49,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 90.38372093023256) internal successors, (7773), 86 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 194.0) internal successors, (16878), 87 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,386 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 194.0) internal successors, (16878), 87 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:49,386 INFO L175 Difference]: Start difference. First operand has 526 places, 1255 transitions, 23172 flow. Second operand 86 states and 7773 transitions. [2023-11-06 21:56:49,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 2208 transitions, 45721 flow